A few weeks ago a good friend Cameron who helped create, preserve, share and star in one of the greatest historical collections we own made a comment on Facebook about not being sure how the collection was being stored and it dawned on me: we’ve gone to great lengths to protect the things we’ve been entrusted with but we’ve never shared the details. Today, in what I hope will become a series of how we archive all our collections, we’ll go over how we store and protect what we’re calling “The Lost Northside Negatives”.
How did we start?
We’ve all seen the meme’s in our socials about how Gen-X had the advantage of growing up hanging out and going to parties without anyone having a camera. For us, that wasn’t the case. When I was 14 my Mom took my request for a camera for Christmas and bought me a Nikon EM 35mm SLR with a 50mm lens.
About this time the whole neighborhood group was increasingly into BMX riding, first racing and then tricks. Skateboarding was soon in the mix and a lot of the kids in the little town of Racine, Wisconsin were quickly trying to emulate the riders and skaters in Southern California often by capturing our own photos to match the pictures we saw in all the BMX/Skating magazines. Film and developing was expensive, and we were young, so we’d scrape together $15 however we could to shoot and develop a roll. Eventually some of us had jobs and so we’d buy more film, and I often had that camera on my shoulder, and we shot roll after roll.
The camera that started the collection
How we created the collection
From 1984 to around 1992 first myself, then Cameron and other friends, we’re shooting the events of our daily lives, the riding, the skating, the parties, the hanging out almost like the youth today with their phones. And this was the prime Gen-X 80’s when we were feral children, we’d be up early and out of the house all day deep into the night with little parental oversight. And there was a camera on my shoulder for much of it.
We would take the developed rolls and go through the 3” x 5” images to pick out the best, put them in photo albums, not care about the negatives at all or the prints we didn’t like so they got shoved in a drawer in Cameron’s bedroom forgotten about. Honestly, I can’t explain how we didn’t just throw them out like we did most of the prints we didn’t use. There were several hundreds of rolls of 24 or 36 images taken over the years and thousands of images total shoved in a drawer and forgotten about as we all grew up and moved out of Racine.
The author at a 1970’s themed New Years Eve party, 1992
About 10 years ago Cameron came to the house and dropped the bomb that his mom, 20 years earlier, found the negatives when she was cleaning out his childhood bedroom and saved them all. She put the sleeves into a grocery bag and then put into an orange milk crate and stored in her attic. Approximately 5,000-10,000 35mm images documenting our shenanigans from the ages of 14-22 had survived.
How we’re protecting our collections
When we bought the house my family lives in now, during the showing, we found a room in the basement that is cinder block on two sides, shelves on the others, is window-less and has a drain in the middle of the floor. We jokingly called it “the murder room” because it was pretty creepy, but as I moved all our genealogy collections in I realized this was the perfect place to store them.
It’s smaller than the rest of the basement, so easier to climate control, it has many shelves and plenty that are over 3’ off the floor, and it’s clear that basement has never leaked. The drain leads to the city storm sewer so even if the basement flooded the drain would keep this area dry and we’d have our collections up off the floor.
We’ve installed portable heating and cooling units in the room (now called the “genealogy room”…much better than it’s old name!) as well as humidifier and de-humidifiers. With that, we can keep the space at 55 degrees (+/- 5 degrees) and 35% humidity (+/- 5%) which is close to optimal for medium term storage of our documents, historical photographs, and our photographic negatives.
Long term it’s important that all family historians look to move their collections to more professional organizations for proper safe keeping (link), but it’s increasingly difficult to find archives that are willing to take in new collections due to the costs. It’s expensive to properly archive them, and then store them, so we’re putting in the time, effort and cost of using professional archiving supplies to store our collections.
How we’re protecting the Lost Northside Negatives collection
Beyond keeping them in a temperature and humidity-controlled space, we’re purchasing professional archiving supplies from Hollinger Metal Edge (link). A polyester sleeve holds each negative strip with each of the sleeves for a particular roll collected inside of an acid-free paper envelope. The envelopes then stored in a buffered acid-free metal edge box.
The current batch of Lost Northside Negatives to be scanned and archivedAn example of a fully-archived roll of 35mm film, in sleeves, showing the storage envelope and box.
When we scan in each roll (more to come on that!) we clean each negative with a lint-free cloth and proper cleaning solution, then place them in the sleeves/folders/boxes. The supplies work out to be about $3/roll, and I expect we’ll spend another $2,000 to $3,000 on archiving supplies to finish the collection. But, it’s worth it because not only are we ensuring the negatives are as protected as possible, by using top-quality supplies and industry best-proactive for archiving it’s more likely that if we ever want to donate these to a museum or archive they will accept them because there is less work for them to do to bring them into their collections.
What’s next
The negatives that somehow survived history are now well kept with full protection. I am taking longer than I would like to scan and present them because I have too many projects to manage, archival supplies are expensive, and the work itself is time-consuming. I’ve digitized about 1000 images so far (The Lost Northside Negatives) and each roll takes about 4 hours to fully process, so that effort took about three and a half work weeks. Now that we’ve got a new batch of supplies in I’m able to process a new set of negatives, but in the meantime they are protected and kept safe!
The lack of quality of Public Ancestry.com family tree s is legendary, to the point many family historians consider them nearly useless. They tend to be so poorly sourced that we’ll bet you’ve checked out and found an ancestor’s name and a detailed birth and death date, but the only source is an Ancestry Member Tree, and when you click that tree, it’s another tree-only, and so on. The worst part of these poorly sourced trees is they often become considered “legitimate” sources because they are repeated so often!
So, we decided we’d be a part of the solution and walk through how we wish all Member Trees were sourced. We’re going to first talk about how sources, facts and citations all work together, how we choose to link them and then what it looks like on Ancestry.com.
Before we get started, please understand this one approach, and it’s our approach. We would never be calling out how someone else is approaching tree sourcing as “wrong”, and this approach isn’t necessarily “right”. It’s right for our research, and if every Member Tree we came across was sourced like this we’d be very happy.
Defining the elements of a good citation, fact, source and proof
Let’s start by defining what’s meant when we’re talking about facts, sources, citations, and the notion of proof.
Citations
Understanding citations, and beginning to enforce the standards you settle on, is one of the turning points as family historians evolve into serious hobbyists. We are HUGE fans of Elizabeth Shown Mills’ Evidence Explained (Link) but at it’s most simple a citation must be a breadcrumb that researchers after you can follow to confirm your work. A well written citation should allow anyone to copy the path to review information themselves.
Sources
Sources are straight-forward as well, for the purposes of this discussion. They are the pieces of information that indicate a fact about one your ancestors. Family bibles, Ancestry.com indexes, headstones, interviews with family members, etc. are all examples of sources that yield clues about your relatives.
Facts
Facts and proof are a little trickier. They tend to both confuse, and be ignored, those newer to genealogy. At their most basic, facts are events that have been proven.
Facts at first seem obvious. If my birthdate is May 4th, that seems like a fact. But facts and proof are intertwined. How do you know my birth date is May 4th? Honestly, other than me telling you it’s my birthday, you don’t.
Even in this simple example, that it’s not your duty as the reader to prove my birthday, it’s my duty to prove that date because I’ve made statement that it’s a correct birthday. For me to do that I can attest I’ve celebrated that day my whole life, my Mom told me it was the day, and there are some family members who were there when I was brought home from the hospital. Additionally I have many Aunts and Uncles who remember my mother being pregnant during the time that corresponds with my birth, and I have photographs of her pregnant that were date stamped during that same time, as well as letters and photos (also stamped) after my birth. I also of course have my birth certificate, which was completed and certified near the time of my birth by the attending physician.
But facts get much fuzzier as we look backwards. For our African American ancestors who died in the late 1800’s, we might have only 2 Census ages to show when they were born. Going back further, we might be relying on various Family History collections that are quoting dates that are 8 levels removed from the original source documents, and those documents are long since lost to history. Of course no one is around to provide a statement that they were present at the time of birth, and rarely do we have historical accounts of our ancestors.
Proof
This leads us to consider how we “prove” “facts” for an ancestor who’s long since gone. In many ways there will never be definitive proof for many of the events in our ancestor’s lives. We’ll hear in court dramas that crimes need to be proven “beyond a reasonable doubt”, but for our hobby the Genealogical Proof Standard (GPS Defined) was designed to help guide us on this question. In the strictest definition of proof, the GPS describes 5 elements needed to argue that a fact is a fact. But we aren’t professional genealogists and the need to formally prove every fact isn’t required, however understanding the GPS will still helps guide us on how close we are to a proven fact, and when we have more work to do. For example, if we’ve just taken a few US Census entries and settled on an ancestor’s birthdate as “proven”, it’s likely we haven’t done a “reasonably exhaustive search”, and so we haven’t hit the first element of the formally proving a fact. That might be just fine for some facts, but just the beginning for others, and as hobbyists doing an Ancestry Member Tree that we aren’t required to be hyper-vigilant proving everything. However keeping the Genealogical Proof Standard in-mind should help you understand where on that spectrum you are.
What to do with Facts?
With the definitions out of the way, and with our basic knowledge of how to create Ancestry trees and ancestors in those trees, let’s get started by highlighting the best practices for sourcing our facts.
Each fact should have at least one source attached
The first key to a solid Ancestry tree is attaching a source for every fact attached to each ancestor. If there’s a fact asserted about an ancestor, but there’s no citation pointing to a source that lead us to attach the fact, no one can prove if it’s accurate or not and we increase the risk of passing bad information along. If we all followed this one rule then all Member Trees would have sourced and cited events and we’d all be able to get much further in our research.
Attach all sources to the preferred fact, or list a fact for each source?
How we decide to attach sources to facts plays a big role in our tree building, and there are two schools of thought on how to attach facts to sources online. The most common method is to attach all facts of the same type (say Birth) to the primary fact, even though Sources may not match that fact exactly. For example, our 3xGGF Wesley has facts that say his Birth was: 16 Dec 1837, Abt. 1836, Abt. 1837, Dec 1837, and Abt. 1838. Most people would be to set his primary date of birth as 16 Dec 1837, and attach all sources to that primary.
The other approach, and the one we use, is to attach each fact to each source as they are sourced. In this example we have chosen 16 Dec 1837 as Wesley’s Preferred birth date and we’ve attached the two sources that indicate that date: his obituary and his family bible. The 1850 US Census has Wesley’s birthday listed as “Abt. 1836”, and so we have an Alternate Fact for his Birth of “Abt. 1836”, with the 1850 Census attached as a source. The same for the 1860 Census and “Abt. 1837”. Repeating the process for each source until we have all known Birth dates (5 in Wesley’s case) listed, and each has the proper source attached.
A lot of people avoid this approach because your ancestors will often end up with many events like dates of birth, where there can be only one, and because all the records can clutter an ancestor’s record. Alternatively, if all the records are tied to a single, preferred fact it becomes difficult researching which sources attached to a fact actually assert that fact.
As an example, as we did our research for this article we found our ancestor Ephraim Treadwell, and when we clicked through to review the sources attached to other’s Member Trees to confirm his place of death, we found each tree had a single Death date, with all sources of his death attached to that one date. A deeper dig showed this is how every of his Member Trees was sourced, and looking at his death fact, it indicates at first glance that every source supports that date of death and that his place of death is Fairfield, CT. However, none of the sources support his death location, and only some support his death day. To determine which sources support which facts, we had to review each source individually, and build a list on paper what each listed as a fact. It would have been MUCH easier if they had chosen to link each source to the fact as it was sourced, but by choosing to link all sources to the preferred death fact, we have to dig through each source to determine what those sources actually support.
In the end, we’re big advocates for showing what the sources support, with facts listed as they are asserted, as the best way to get a true picture of the facts that make up your ancestor’s record. Even when those facts aren’t precise or even correct.
Connect all facts, even when they don’t appear correct
We’ve found that only through the complete presentation of all records can you review and identify what facts are likely correct. Because of that, we prefer to present all our facts as they are sourced, and later interpret what’s likely accurate/inaccurate. If you’re editing out “mistakes” as you’re attaching sources, it’s very easy to make the facts fit your current understanding of your ancestor. It will also leave you blind later when you find a record that might support that “mistake” and you’re missing a new path to truth. This is within reason of course, and if you’re sure the ancestor died in 1767 but a records hint says there is a 1810 US Census entry for him, you can pass on that.
Sticking with our Tradewell family examples, Wesley’s father James Bennet Tradewell has records indicating a range of birth dates from 1790-1799. Originally we didn’t have a single solid record that indicated an accurate birth date, but most of what we had clustered around 1796-97. Seeing the range helped when we found a Family Bible entry for James that indicated 11 Aug 1796. Even though the bible entry was completed at some point after 1855 (meaning it was entered long after his birth and should be treated as suspect) we were comfortable accepting it because it fits the previously known range…which we can easily see in his “Timeline” view.
In the end neither choice is officially right or wrong, but we wanted to put this approach out there for your consideration. It can be counter-intuitive attaching facts that we are pretty sure are incorrect, but for us to better understand what’s correct we need to see the full picture so we can best interpret them to find the truth.
Building a good Ancestry.com family tree
The key to creating a good Public tree is this: make sure you have a source for every fact you attach to an ancestor, remembering that Members Trees are NOT sources. Let’s walk through how we can quickly get started with a new tree.
Start with what you know
We should start trees with what we know. If it’s a personal tree, adding parent’s information and what you’ve heard about grandparents is the perfect start. It’s ok at this point for there to be no sources attached to the facts, you’re just trying to get the outlines of your tree fleshed out with the data you know. Just because mom says grandma’s middle name was Marie, that’s fine to enter for now. If we’re building from a record that lists a new ancestor, it’s the same concept, in that we’ll use the information from the record as-is to start.
Let’s use our ancestor Hezekiah Treadwell (1707-1761) as an example for this process. This ancestor is in a “Working/Uncertified” tree of ours, meaning we haven’t proven the facts and there could be guesses in this tree. We first found Hezekiah as we were building out John Treadwell’s tree, with him listed as a child of John and Abigail (Minor) Treadwell in the Ancestry.com record “History and Genealogy of the Families of Old Fairfield, Vol. II Part II”. This is a good example of building a “skeleton” tree that we might build out quickly to get to a particular, known relative or when we’re building out new family connections as far as we can. They are skeleton because we won’t attach every source and do deep research right away, but we’ll go back later to flesh out these ancestors.
Review your “shaky leaf” hints one-by-one, with an eye towards accuracy
These hints are often only 10% of the records held by Ancestry, but if we’re just getting started on a tree it’s the perfect place to attach the most likely facts for an ancestor. But, just because something is listed as a “fact” on Ancestry, it doesn’t mean it’s either a fact or accurate. Take a few moments to understand the source, give it a quick “smell test” and decide what/how you’re going to use the source.
For example, there is a hint for Hezekiah that references “Connecticut, U.S., Church Record Abstracts, 1630-1920″ and it lists his father as “Jno Treadwell” and his residence on 9 Nov 1707 as Bridgeport, Connecticut. The record passes the first smell test: we think Hezekiah’s father was John, the location is about what we’d expect, and the date listed is within both of their lifetimes. However, when we clicked first on the hint, and then image of the original, we saw the record was actually for Hezekiah’s baptism. The church these records are taken from was in Bridgeport, but we can’t assume they were living in that town, and besides the baptism information is valuable and we would have missed it if we hadn’t reviewed the record completely. Don’t just assume what Ancestry is showing is correct.
The same goes for Find a Grave. Hezekiah’s hints list a Find a Grave entry, which was exciting, but when we reviewed it there is nothing that attaches to an actual grave. It literally shows the Burial as “Burial Details Unknown”, and the Memorial is just a paragraph from the history book we’ve already cited. There’s no unique information in this “record”, and so we ignored it.
Filter out records that don’t provide value
Continuing with Hezekiah, the final two hints we’re provided reference the “Geneanet Community Trees Index” and the “American Genealogical-Biographical Index”. As a rule we try and avoid Index records where possible because they are derivatives of some other work, just one more generation removed from the original. In this case we have a couple of additional issues with these sources, First, there is no way to go back to the source for these indexes because they don’t specifically cite their sources. Second, the Geneanet Index is just a summary of the old public user trees from that old site and we’re trying to get away from unsourced public trees! Finally, the facts they list are also duplicated by other sources we’ve already attached so there’s no value to attaching these indexes.
Attaching Public Member Trees
Wait, weren’t we avoiding these trees?? Yes, but while we can’t depend on them for any facts we do want to link with other users who have our same ancestors in their trees, in case they do later attach a record of value and we want Ancestry to notify us.
When we review these Public trees, the first scan should be for any facts they have listed that we don’t and we can see that by the blue checks next to a fact. For Hezekiah, we see differences in his Birth, Marriage and Death records. Birth is easy to ignore because we know from previously attaching that date the record says he was born either in the towns of Fairfield or Stratford, so we used the county they are both in as his location and made a note of the two towns. The Public tree difference is the location of his birth is listed as Stratford, so that makes sense and we’re not accepting that fact, so we’ll leave the box unchecked. Similarly, the Death value is listing the date of the first court testimony regarding his will, and the court record doesn’t list a date of death. Given that it’s highly unlikely anyone would rush to court to swear in a Will on the same day someone died, we won’t be attaching that date to his death.
But the Marriage value is for an entirely new event, 28 years after his known marriage to Mehitable, and we’ll need to review the trees to understand their sources. Cancel the “New Information” screen, open Member Trees again in Hints, and select the ancestor’s record from the Ancestry Member Tree. That showed us the member’s tree, and when we scrolled down to the new Marriage record, we see it has no Sources attached. We’re not going to attach unsourced facts, so we know we can ignore this event.
Go back to the Add New Information to Your Tree screen, and make sure no facts are attached on the left side. Now, when we click “Save to Tree” this Public tree will attach to Hezekiah, but it won’t attach as a Source for anything and we won’t propagating unsourced facts from other members’ trees!
Attach the facts to the sources
Finally we need to ensure all of our new Sources are attached to Facts, and we have to be careful here because we’ve accepted some hints for Hezekiah with the Source attached to him, but the Source won’t automatically be attached to any Fact. Additionally, Facts often won’t all be linked to the source, like when we accepted the “History of…the Families of Old Fairfield” record above it not only didn’t link to any Face, it didn’t create the listed death year at all. Make sure each of the facts listed in the record exist in the ancestor’s timeline, and attach the Source to each Fact right away. Skipping this step is how we end up with unsourced trees!
You’ve got a strong Ancestry.com family tree…what’s next?
When we’re done we have created a new Family Tree for Hezekiah and Mehitable Treadwell, and their children, that is fully sourced and supported by those sources. This entire process took us less than 10 minutes to complete showing it doesn’t take much time to create an accurate record, even when you have 15 hints. Anyone reviewing your tree, including yourself when you come back later, will be able to easily identify all of the facts relating to this ancestor as well as all the records that support those facts.
If this is a direct ancestor you can do more work to build out their information. Start by running a search in Ancestry, and since you have a solid base of facts the search results will much more focused and likely to be an accurate match. Just attach new sources and facts as detailed above, and your tree will continue to be well sourced.
Our example, Hezekiah, is not likely a direct ancestor of ours but we are building his tree out as we hope to catch more DNA matches. Since we don’t need a full picture, and since we have solid Birth/Marriage/Death info and a complete accounting of his children we will leave his record as-is, and we’ll repeat the process for each of their children, then grandchildren, and great grandchildren, etc. (Matching unmatched DNA Hints by Casting a Wide Net)
One of the all-time best family history interviews we’ve ever conducted was with Felice’s Great Aunt “Ann”. Ann and Felice’s Grandmother Delia were well known for being pretty crazy in their younger days. They were clearly free spirits who came of age about 20 years too early, and too deep in the bible belt. They would have fit well into the Summer of Love in 1967, or the singles bar scene of any major city in the 1970s. Neither was single, but that was never an issue for them.
By the time Super Bowl XV kicked off that night we knew we likely had identified Felice’s mystery Grandfather. We also knew that we were going to be changing a lot of family history.
Ann, who is now 82, has always been a kind, happy woman. Never out to hurt anyone, but never too concerned about what others thought about her ways. She told us stories about how she married her first husband, Luther White when she was pregnant at 13 years old. They only briefly lived together and she “made him stay in the streets because he was a whore”. Ann said he would come over from time-to-time and she’d “let him do what he had to do”, which resulted in them having a child every year or two. Luther’s parents supported her and the children, and they went on to have 9 children together.
Ann eventually moved out of the White household, and soon found a man to move in with. She explained that she needed a “babysitter” so she and Delia could go out and enjoy themselves, and this man fit the bill. Ann says that Delia might have been a little crazier than her, but they were clearly partners in crime.
Transcript of Ann’s family history interview
One of the more telling stories Ann told us was from when Delia was living next door to Ann’s close friend Lilymae. Lilymae’s husband Jack and Delia were having an affair, but Ann wasn’t going to get involved. She didn’t judge her sister. Despite being friends with Lilymae, when she got in a physical fight with Delia over the affair, Ann sided with her sister. Ann told her best friend she’d “beat her ass” if she touched Delia again.
That interview was playing through our head that Super Sunday as the theory that Luther was Mary’s father dawned on us. There’s no reason to doubt that Delia might sleep with her sister’s husband. And, if she had gotten pregnant by Luther it could explain why Delia wouldn’t put the father on Susan’s birth certificate. She said she didn’t know who the father was, but it’s likely Delia knew exactly who it was. Susan’s Grandfather didn’t want her to not have a listed father. He filled out the Birth Certificate, entered the name of the man who fathered Delia’s other two children, and life moved on.
Since Delia passed away in 1999, and Luther in 1994, there would be no first-hand confirmation of this theory. We had only DNA to go on.
Purported photo of Roman and Mary (Stewart) Jones
From our interview with Ann, we knew only that Luther’s parents were Ira and Eula White, so we started there. The work we did in “Casting a Wide Net” pointed to Roman and Mary Jones as our target Most Recent Common Ancestor. We identified 17 DNA matches who shared the Jones’ as their MCRA. If the link between Roman and Mary and Susan was through Luther’s family, either Ira or Eula had to be a descendant.
We first mapped out that Ira White was the son of Pleasant and Cora (Gordon) White. The White family was in the Northeast Mississippi area around the same time as Roman and Mary Jones, but not in close proximity. Pleasant and Cora were both born enslaved, but we were able to establish both of their sets of parents. None of them lined up with what we knew about Roman and Mary.
We then shifted to Eula’s line and discovered her parents, Joseph and Sarah Moore, were living in the same County as the Roman and Mary at the same time. From our earlier research, we knew the Jones’ listed a daughter Sarah in the 1880 US Census, who was born about 1873. As we researched Sarah Moore we found her in the 1900 Census, with her birth date listed as November 1872.
If we can prove Sarah Moore was born Sarah Jones, we can establish the match to the 17 DNA lines we’ve linked, and prove that Susan’s Father was Luther White.
We had a solid lead that only got more firm as we looked further. When we mapped out the 17 DNA matches using DNA Painter using the theory that Luther’s Grandmother Sarah Moore was born Sarah Jones, it all lined up as expected.
By the time Super Bowl XV kicked off that night we knew we likely had identified Felice’s mystery Grandfather. We also knew that we were going to be changing a lot of family history. Ann is still alive, and if we were right her children would learn their Father had an affair with their Aunt, and their cousin also their half-Sister. For Susan discovering her long lost Father was not going to bring the happy reunion, we’d hoped for.
But, our disruption of the family history would stretch further than we knew at the time.
In early 2018 we made a series of posts on how to use the multiple “Shared Matches” in AncestryDNA to narrow down the DNA line that connects you to them. The challenge was that often they have no trees, or small trees that don’t come anywhere close to matching your (much more complete!) tree.
This strategy was a way to use mirror trees to match them to themselves, which should indicate a Most Recent Common Ancestor for them, and in all likelihood to be your MCRA as well. For this series we broke down a large set of matches (5000+) to Felice’s mother, to try and establish her first DNA link outside of the immediate family.
There were all of the challenges we all face with African American genealogy (fewer family histories to draw off of, smaller trees, difficulty with 3x/4xGGP’s due to the “1870 Wall”, etc.), and in this series we found the MCRA…but we failed to find the link between them and our family. However, about a year later we broke through that wall, and we’ll be following up on that shortly. In the meantime, here’s the complete series in one page:
We promised to keep this series as science-free as possible, and instead focus on the practical use of AncestryDNA tests to identify your ancestors. We’re going to keep that promise here, but we want to say a few words about other types of DNA tests you can’t get from Ancestry, and how xDNA, yDNA, and mtDNA can be useful! Just remember, we’re generalizing a bit here, and if you want the detailed science behind all of this, Google has many great reads.
yDNA and mtDNA
yDNA and mtDNA come only from your father and your mother, respectively, and change very little over the generations. These tests are often written off in the genealogical community, because they won’t, by themselves, lead you to how you are matched with someone, or how many generations back you might match them.
For example, if our Michael has a yDNA test and he matches “Frank” who shares the same yDNA…it tells us next to nothing. From the test we know that on Michael’s paternal line we have proved he’s matched to Frank…but there’s no way to tell how. It could be 1000 years ago we all had a MRCA, or it could be that Frank’s 4xGGF was a brother to ours, but there’s no way that kind of range will narrow it down by itself.
There are two uses of yDNA and mtDNA, however, that makes these some of the most powerful tests you can take:
Geographical location
Unlike “ethnicity” estimates we see from all the major testers, yDNA and mtDNA can be very effective in pinpointing very accurately the location of your ancestors on the planet. The standard (Autosomal) DNA tests from Ancestry rely on a small global sample of historical DNA (16,000 samples currently), and human created Family Trees, to mathematically try and guess where our ancestors were 800-1000 years ago. They are looking for little shreds of DNA to trace back, and it’s very small amounts because Autosomal DNA gets cut in 1/2 for each side of a lin ever generation. However y/mtDNA doesn’t change over the generations and so we know very accurately where those ancestors were, based on where the bodies were found. This is especially important for African American genealogy, when there are nearly no records of origin before our ancestors were taken from Africa. These tests can be very accurate, and place your ancestral group in to very small physical and/or social (tribal) locations.
yDNA groups, and how they migrated over the centuries. From FamilytreeDNA.com.
Brick wall research
In our example above, we know for a scientific fact that Michael and Frank share an MCRA along their paternal line. The same is true for women who have an mtDNA match. While that again doesn’t help us much if we have no information, it’s invaluable if we have a good guess on how we’re related. Let’s go back to our DNA Painter walkthrough to see how we wish we had yDNA and mtDNA tests.
To recap from last week’s post, we have two lines of DNA tests that we know are connected, and we have narrowed down the MCRA for both a cluster of AncestryDNA matches and on our line, but we don’t know how they connect. So, we have two couples (Jacob/Maria Kupsch, and Joseph/Dorothy Haasl) that we know match, most likely 2-3 generations above them. Each of them have 8 potential match relatives, and we have 4 known relatives, so we’re facing 32 ancestors that might be our MCRA.
But, if we can confirm the y/mtDNA from those 4 relatives, whom all died over 100 years ago, because that DNA doesn’t change between generations. That means a direct male relative from Jacob (say his son’s, son’s, son’s, son’s DNA) will confirm Jacob’s yDNA. Same for Maria, and a direct female relative. If we could yDNA test relatives of both Jacob and Joseph, and mtDNA for both Maria and Dorothy we would have about a 25% chance of finding an immediate match. And, if say Maria and Dorothy share the same mtDNA we just figured out we need to focus our research only on both of their maternal lines to make our match. If we don’t find that match, we just eliminated 25% of our potential match points, so now instead of building out 32 ancestors to find our match, we’re down to 24. But even better, if we can go one level up and do the same thing, we can eventually narrow this down to where we share an MCRA.
Going back to the GEDmatch installment of this series (How to make the most of your AncestryDNA matches: Part 4 – How to quickly, and effectively, use GEDmatch), there was a column in our DNA matches that showed the amount of xDNA that we matched other testers. The good news is that all of the major test kits include xDNA measurements in their most basic test. The bad news is, it’s unlike the other types we’ve talked about, and it’s almost useless. With one very valuable exception.
It would be highly unlikely we could ever build out a family match with xDNA, and the cM you share with someone tells you almost nothing about close of a match you are with them. The main value of xDNA is if you do match someone, it narrows down your link to that match in a very powerful way. xDNA is inherited in a unique pattern that going back several generations can eliminate more than 50% of your tree as a potential match.
Women will inherit an X chromosome from both their mother and their father, but men will inherit an X from only their mother. Going back to High School Biology, we quickly remembered that women have an XX chromosome, while men have XY!
But, the value for us comes in when we build out our potential ancestor’s chart, using that inheritance pattern. So, if we have a female test subject who has an unknown xDNA match, we know it’s not from her Father’s Father’s line because men only inherit their X from their mothers. Going back 2 generations, we just eliminated 25% of the potential matches. If you know, from other research, that this unknown match is on their father’s line, you just confirmed it’s on the father’s mother’s line.
xDNA inheritance chart, from DNAeXplained
You won’t see a lot of xDNA matches, but when you do, Google one of the many xDNA inheritance fan charts, and start to see if you can eliminate suspects in how you match. It could bring you much closer to where to hunt for your MCRA.
Here’s a great break down of xDNA from DNA Explained, with more links to more detail as well: (Who Tests the X Chromosomes)
Just know that all of this work will have to be in GEDmatch however, since AncestryDNA doesn’t provide any information on the details of your genetic matches, and none of the tools needed to view/manage this information.
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