DNA Circles at AncestryDNA can get problematic when participants’ trees are unverified. This is why.
Adding people to a family tree without verifying the connection is a fairly common genealogical practice. This happens a lot when people “graft” information from another online tree.
In addition to the problems this can create in your tree, it can create problems when you start looking at genetic connections. We have received a few inquiries about this topic here at Genealogy Gems, and I chatted with a fellow genealogist about this at a recent conference.
The practice of copying online trees factors most heavily in the DNA Circles and New Ancestor Discoveries (NAD) at AncestryDNA. You will remember from our previous conversations that these tools are like parties that your DNA has secured your tickets to attend. Each of these parties is “hosted” by one of your ancestors, in the case of the DNA circle, and a presumed ancestor, in the case of a NAD. Sometimes we catch ourselves declaring that our membership in the DNA circle “proves” our connection to the party host.
But we must be careful. Because it does not.
“Proves” is too strong of a word. All your membership in the DNA circle can really tell you is that you have a genetic connection to those marked with the orange line. Those with the grey connecting lines have a DNA connection to some of the circle members, but not to you. Placing the name of an ancestor on the cover of this gathering does not guarantee that the named person is your common ancestor. It is just a suggestion; a hint.
Think about this for just a second. Let’s say that Joan does a bit of research and decides that her immigrant ancestor’s father is Marcus Reese, born in 1823 in Wales. She adds this to her pedigree chart. She sees on a census record that he had four children, one of whom shared the name of her ancestor, William, and adds those to her chart as well.
Months later, Charlotte is researching her Mary Reese and sees Mary listed on Joan’s pedigree chart as the child of Marcus. She knows Mary’s father was born in Wales and adds Marcus to her pedigree chart telling herself that she will go back later and double check. And so on.
After a while, we have 7 people all connected back through Marcus and his four children, and they all independently decided to get their DNA tested through Ancestry.com.
Ancestry sees their shared DNA and that they have all listed Marcus Reese as their common ancestor. So they create a DNA circle for the seven of them, with Marcus Reese at the head.
Ancestry did not look at the number of cited sources or the myriad of other genealogical possibilities about how these seven individuals could all be related to each other. It saw a genetic connection and a genealogical hypothesis, and it presented them to you in the form of a DNA circle.
The genetic evidence supports a single common ancestor for these 7 people, but it certainly does not have to be Marcus Reese. You can become more certain as you gather the traditional genealogical evidence that you would in any other case. As your documentation mounts, so will your confidence, with the DNA acting like an invitation to keep searching for further evidence of your connection.
If you enjoyed this post, you’ll love my series of DNA for genealogy quick guides. Each laminated guide–with quick, clear text that helps you act on what you learn–is targeted to a specific DNA topic, from “Getting Started” to the three types of DNA tests you can take to understanding your results with testing companies AncestryDNA, FamilyTreeDNA and 23andMe. Why not grab the “super bundle” of all 10 guides? You can also shop for them individually here.
Disclosure: This article contains affiliate links and Genealogy Gems will be compensated if you make a purchase after clicking on these links (at no additional cost to you). Thank you for supporting Genealogy Gems!
Lisa shares her experiences Down Under in Australia
Enjoy Lisa’s exclusive RootsTech 2018 interview with Findmypast CEO Tamsin Todd;
Military Minutes contributor Michael Strauss shines a spotlight on women who have served in the U.S. military;
Your DNA Guide Diahan Southard introduces the MyHeritage chromosome browser; and
Genealogy Gems Premium membership gets its biggest boost ever.
NEWS: ROOTSTECH 2018 RECAP
Click here to watch the short RootsTech 2018 official recap video.
NEWS: GENEALOGY GEMS PREMIUM eLEARNING
Update: The Companion Guidebook has been discontinued.
Lisa Louise Cooke uses and recommends RootsMagic family history software. From within RootsMagic, you can search historical records on FamilySearch.org, Findmypast.com and MyHeritage.com.
Keep your family history research, photos, tree software files, videos and all other computer files safely backed up with Backblaze, the official cloud-based computer backup system for Lisa Louise Cooke’s Genealogy Gems. Learn more at https://www.backblaze.com/Lisa.
To learn more about Legacy Tree services and its research team, visit www.legacytree.com. Exclusive Offer for Genealogy Gems readers: Receive $100 off a 20-hour research project using code GGP100. (Offer may expire without notice.)
MILITARY MINUTES: CELEBRATING WOMEN IN U.S. MILITARY HISTORY
Military Minutes with Michael Strauss
Click here to see the full article (and plenty of images!) on the Genealogy Gems website.
INTERVIEW: TAMSIN TODD AND BEN BENNETT, FINDMYPAST.COM
Findmypast.com is the Genealogy Giant best known for its deep, unparalleled historical record content for England, Scotland, Ireland and Wales.
Tamsin Todd is the Chief Executive Officer of Findmypast.com. She “has worked in the travel, retail and technology sectors, and brings with her a track record of leading successful growth businesses. She spent the early part of her career at Amazon and then Microsoft, where she led the introduction of ecommerce and search products into the UK and Europe. This was followed by stints as Head of Ecommerce at Betfair, and Managing Director of TUI-owned Crystal Ski Holidays. She joins Findmypast from Addison Lee, where she was Chief Customer Officer of Europe’s largest car service company. Tamsin lives in London with her family, and is Digital Trustee of the Imperial War Museums.”
Ben Bennett is Executive Vice President, North America and International at Findmypast.com, “focused on helping families stay connected in the United States and other markets across the globe.”
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YOUR DNA GUIDE: MYHERITAGE CHROMOSOME BROWSER
Just last year, if you had asked me if I thought anyone could catch AncestryDNA in their race to own the genetic genealogy market, I would have been skeptical. However, it is clear that MyHeritage intends to be a contender, and they are quickly ramping up their efforts to gain market share and your confidence.
MyHeritage began 2018 by making a much-needed change to their DNA matching algorithm, which had some errors in it. They were able to adjust it, and now it is humming right along, telling our second cousins from our fourth. Another development, launched in February, is the addition of a Chromosome Browser.
THE NEW MYHERITAGE DNA CHROMOSOME BROWSER
Much like you would browse the library shelves for the perfect book, or browse through the sale rack for a great bargain, you can use a Chromosome Browser to look through your chromosomes for the pieces of DNA you share with your genetic cousins.
Chromosome Browsers can be everything from a fun way to review your genetic genealogy results, to a tool to assist in determining how you are related to someone else. Let’s go over three tips to help you make use of this new tool.
NAVIGATING TO THE CHROMOSOME BROWSER
There are actually two different kinds of Chromosome Browsers in MyHeritage: one to view only the segments you share with one match (the One-to-One Browser), and a browser where you can see the segments shared with multiple matches (the One-to-Many Browser).
To get to the One-to-One Browser, head over to your match page and find a cousin for whom you would like to see your shared DNA segments. Click on Review DNA Match, then scroll down past all the individual match information, past the Shared Matches and Shared Ethnicities until you see the Chromosome Browser.
USING THE ONE-TO-MANY CHROMOSOME BROWSER
To find the One-to-Many Chromosome Browser, you can use the main DNA navigation menu at the top of the MyHeritage homepage. Click on DNA, then on Chromosome Browser, as shown below.
In the One-to-Many Chromosome Browser you can compare yourself, or any account you manage, to anyone else in your match page. To choose a match to evaluate, just click on their name and they will be added to the queue at the top, as shown here.
Clicking on Compare will then allow you to see the actual segments you share with each person:
In this One-To-Many view, each individual match gets their own line for each chromosome. Since we have added 7 people to the Chromosome Browser, there are seven lines next to each chromosome number. Each match not only gets their own line, but also their own color. So you can easily match up the lines on the chromosome to the match that shares that piece of DNA with you. For the majority of people the majority of the time, these Chromosome Browsers are just another fun way to visualize the connection you have with your DNA match. In the end, it doesn’t matter where you are sharing on the chromosome, just how much DNA you are sharing. You can obtain that information from your main match page and never look at this Chromosome Browser image, and still make fantastic genetic genealogy discoveries.
THE TRIANGULATION TOOL
Another feature of the Chromosome Browser on MyHeritage is the Triangulation tool. To understand how this works, you first need to understand that you actually have two copies of each chromosome. Two copies of chromosome 1, two copies of chromosome 2, etc. One copy is from mom, and the other from dad. However, in the Chromosome Browser image, you see only one line for yourself (in grey). Therefore, when you see someone matching you on chromosome 14, for example, you don’t know if that person is matching you on the chromosome 14 you got from your mom, or the chromosome 14 you got from your dad.
Likewise, if you see two people whose shared piece with you looks to be in the same location on the same chromosome, you can’t tell if they are both sharing on the same copy of that chromosome, or if one match is related to your dad’s family, and the other match is related to your mom’s family. However, this is what the Triangulation tool does for us. It tells us if two (or three or four, etc.) matches are sharing on the same copy of the same chromosome. Be careful when you use this tool, though. Many erroneously assume that when they see a segment shared between multiple people, that indicates the presence of a recent common ancestor for all of those people. However, that is not always the case.
Ready to start exploring what the MyHeritage DNA chromosome browser may tell you about your family history? You have two options. Click here to upload your autosomal DNA test results from another company to MyHeritage for FREE. Or click here to order a MyHeritage DNA test kit. Either way, you can start using all the great tools at MyHeritage DNA!
PROFILE AMERICA: FORD LAUNCHES ASSEMBLY LINE
PRODUCTION CREDITS:
Lisa Louise Cooke, Host and Producer
Sunny Morton, Editor
Diahan Southard, Your DNA Guide, Content Contributor
Michael Strauss, Military Minutes Content Contributor
Hannah Fullerton, Production Assistant
Lacey Cooke, Service Manager
Disclosure: This page contains affiliate links and Genealogy Gems will be compensated if you make a purchase after clicking on these links (at no additional cost to you). Thank you for supporting this free podcast and blog!
Exploring our family health history is just another reason to look forward to the future of DNA testing. As science advances and we find out more regarding the specific genetic code responsible for various nefarious outcomes in our health, we learn there is more in play than just our genetics.
I recently read an article in the Wall Street Journal about a family who has been plagued with sudden deaths, ten in recent generations. Without warning, their hearts were stopping and no one knew why. That is until Daniel Wiggins died suddenly at the age of 29 and his family sought out a molecular autopsy. Becoming more accessible to researchers as the cost of running these tests drop, molecular autopsies allow a scientific team to analyze the DNA of the deceased, looking for genetic clues to the cause of death. In this case, the genetic sleuthing was able to turn up the perpetrator: a mutation that alters the electrical signals in the heart, causing it to stop. [Read more about this here.]
While this case was clear-cut and the gene was acting seemingly alone without an accomplice, researchers of this disorder say it only happens in 20% of cases. Which means, this devious genetic criminal has other methods we still haven’t tracked.
But for Daniel’s family, they can pursue genetic testing to determine if this specific culprit is lurking in their own genes. If found, they can take precautionary measures, like having a defibrillator installed.
Doing Our Part
Similarly, a family from Pennsylvania used their family reunion as a format for gathering family history and genetic information in order to arm its members with an action plan against a plague of cancer that is sweeping through their family. [See an article on this family here.]
Several members of the Shaffer-Peterson family have discovered a genetic test can alert them to possible pancreatic or skin cancer. Again, a gene affecting a very small number of melanoma patients was identified as the perpetrator of the Shaffer-Peterson family and has been given a 67% crime rate. This means that the chance of developing cancer if you have this particular gene is elevated by 67%.
Thankfully, melanoma is a particularly curable kind of cancer when caught early. This family has done their part in informing the family as a whole. And, they now have a sort of insurance plan that may protect the lives of their loved ones.
For both the Shaffer-Petersons and the family of Daniel Wiggins, genetic tests produce actionable results to those testing positive. There is something they can do to positively impact their health once they are aware of the presence or absence of these genes in themselves.
Environment or DNA?
Not all diseases or conditions can be attributed to our DNA. This past fall, after talking with my mother about kids and schedules, she added almost in passing, “Oh, by the way, they found another spot on my back, I am going to have it removed next week.” This is the third melanoma spot she has had removed in the past 5 years.
While my mom’s melanoma is less likely to be the result of a genetic abnormality and more likely linked to spending hours lifeguarding at the local pool, the fact she had melanoma was the sole reason I went to the dermatologist. My spot wasn’t cancer. I was just getting older. But, I am glad I went and I feel like knowing my health history has made me more aware of the measures I can take to improve it.
Tracking Your Family Health History
Diahan offers Genealogy Gems fans a discount on access to her series of videos on understanding DNA testing for genealogy. Click here to learn more.
For most people, molecular autopsies and DNA health tests are not easily available. Not yet. For those that are, there are hundreds of questions surrounding the kinds of genetic tests and the implications for both health and legal issues.
One thing is certain. In these cases, the common thread is family history. We need to know not only the dates and places of our ancestors lives and deaths, but also the stories behind them. Whenever possible, we need to track our health history, so we can identify any trends that our DNA might be trying to tell us.
If you want to start tracking your own health history there are plenty of free and subscription online tools to get you started. In particular, TapGenes was the winner of the 2016 Innovator Showdown at RootsTech. This online and app tool is designed specifically for your family health management.
You can also create your own alternate family tree. In this unique way, you can visually look at age-at-death, diseases, or other factors pertaining to your health. Read our article titled, “How and Why to Create an Alternate Family Tree.”
Gedmatch: A Next Step for Your Autosomal DNA Test Gedmatch is a third‐party tool for use by genetic genealogists seeking to advance their knowledge of their autosomal DNA test. This guide will navigate through the myriad of options and point out only the best tools for your genetic genealogy research.
Organzing Your DNA Matches With over 2.5 million people in the possession of a DNA test, and most with match lists in the thousands, many are wondering how to keep track of all this data and apply it to their family history. This guide provides the foundation for managing DNA matches and correspondence, and for working with forms, spreadsheets, and 3rd party tools.
Next Steps: Working With Your Autosomal DNA Matches This guide outlines what to do next to maximize the power of DNA testing in genealogy. With this guide in hand, genealogists will be prepared to take their DNA testing experience to the next level and make new discoveries about their ancestors and heritage.
“Proves” is too strong of a word. All your membership in the DNA circle can really tell you is that you have a genetic connection to those marked with the orange line. Those with the grey connecting lines have a DNA connection to some of the circle members, but not to you. Placing the name of an ancestor on the cover of this gathering does not guarantee that the named person is your common ancestor. It is just a suggestion; a hint.
If you enjoyed this post, you’ll love my series of DNA for genealogy quick guides. Each laminated guide–with quick, clear text that helps you act on what you learn–is targeted to a specific DNA topic, from “Getting Started” to the three types of DNA tests you can take to understanding your results with testing companies AncestryDNA, FamilyTreeDNA and 23andMe. Why not grab the “super bundle” of all 10 guides? You can also shop for them individually here.
This special bundle