Back to Basics, My DNA talk this weekend

Nov11

The Genealogy Society of San Diego is having me give two talks this coming Saturday, one about DNA basics for genealogists and the other about how I broke some brick walls with DNA testing in my own family.

Talking about using DNA for genealogy is something I love to do. While I have lots of posts and pages here, there is nothing like being able to discuss it in person. The questions I get teach me what is difficult to grasp about this shiny new tool in our genealogy kit so that I can better help others.

sdgstalk

After the talk, I will put the links to my slides at the end of this article, but they have very few words so they are less useful if you were not there. All my presentation slides are at slides.com/kittycooper and the handouts that go with them are in my downloads area here.

If you cannot make it Saturday, here are a few of my articles on DNA basics, all of which are listed under the DNA testing tab in the top menu above:

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An elusive 2nd cousin match at Ancestry DNA

Nov7

When you are a genealogist with an extensive family tree and you get a 2nd cousin match at Ancestry DNA, you expect to be able to find the relationship fairly easily. Never mind that this is my 2nd cousin’s once removed MM’s kit and that the new match has no tree, surely such a close match will want be in touch and know more?

2ndcuzmatch

The second cousin match (red arrow is mine showing where to click)

So I clicked on the View Match button. Sometimes there is is tree or two listed on the full match page that is just not connected to the DNA kit. No luck. Next I clicked on Shared Matches tab to see the matches MM had in common with this new cousin named A. The more relatives you have identified at AncestryDNA, the more useful this feature is.

viewmatch

Red arrow added by me to show where Shared Matches is

MM has my brother and a number of known Goodsell relatives in her match list at ancestry. MM’s paternal grandfather, Charley Wold, is the brother of my Wold great-grandmother Maren. He married MM’s grandmother Martha Goodsell, among a number of other wives. We have lots of Wold relatives who have tested their DNA, but all at other companies.

The shared matches showed that the new 2nd cousin A was in common with several Goodsell relatives but not a match to my brother’s kit. Now I lost interest since A was most probably not my relative. A second cousin on the Goodsell side would be descended from the parents of Martha, so I put this match aside for another day. However it is best to contact treeless folk as soon as possible after their data comes in, while they are still logging in and looking at their results.

There are a few reasons people don’t have trees. The main two are that they are adopted or that they did the test just to see their ancestry composition. So I always craft a careful message that lets an adoptee know that I am willing to help, but hopefully does not scare off those less interested in genealogy.

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When an Ancestry DNA green leaf is wrong

Oct28

By Richard Weiss, Director of Programs, DNAadoption.com

Ancestry.com does a great job of finding common ancestors between DNA matches when both parties have trees. The layout is easy to navigate, intuitive, and well integrated, but sometimes the WRONG person or couple is shown as providing the shared DNA. This problem can occur when you share multiple common ancestors with a match but you or your match have have not yet found all of them.

Let’s look at an example of this.

In September 2016, I received a new match at AncestryDNA – B41. Based on a comparison of B41’s tree and my tree, Ancestry provided a “Shared Ancestor Hint” indicating that Barnabas Pratt was our common ancestor and that we were 5th cousins three times removed (5C3R) as shown below.

richardcaseb41

Figure 1: Ancestry’s “Shared Ancestor Hint”

Note that Ancestry’s “Shared Ancestor Hint” in the above image indicates that B41 and I match through my paternal side.
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I4GG was a great conference

Oct23

Two days of talks in sunny San Diego with headliners Cece Moore and Blaine Bettinger, what a pleasure for the roughly 275 genetic genealogists attending. I always enjoy any talk by either of them but I had to miss a few to go to other talks, so I am really looking forward to the videos. The people who missed the conference will be able to purchase them in a few weeks from the i4gg site.

i4ggkeynote

Cece presenting the keynote

Those of you who overflowed the room for my talk on GEDmatch, thanks! My slides are always available at slides.com/kittycooper – this talk is called GEDmatch Basics. I also have a handout in the downloads section here on my blog.

So what other talks did I enjoy besides Cece and Blaine? Barbara Rae-Venter’s presentation of the Lisa project story had me on the edge of my chair and actually gave me nightmares. I don’t think I have ever had that happen before from a genetic genealogy lecture! Congratulations to all those DNAadoption.com volunteers who helped sort out that case!

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Leah Larkin presents endogamy

I loved that Kathy Johnston pointed out the ancestors that you can inherit X from come in a Fibonacci series of numbers for each generation.

But the surprise delight was Leah Larkin’s endogamy presentation. She is the new editor of the Journal of Online Genetic Genealogy (JOGG) at JOGG.info and has endogamy on her Cajun side. This is a very hard topic to explain and to deal with in your genes but she aced this talk and her slides were terrific.

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A DNA conference and a Methodology for Adoptees

Oct15

The i4GG genetic genealogy conference is coming to San Diego next weekend and it features a track for adoptees as well as one for genealogists. For those of you who want to hear me speak, I will be doing a talk about the tools at GEDmatch on Saturday morning.

DNA testing has broken many brick walls for family historians and has been a miracle for the adopted, helping them find their biological families where traditional methods have failed.

drozcece3Cece Moore, the i4gg conference organizer, has pioneered this field and has developed a methodology that succeeds over and over again. She described this in her cameo appearance on a recent Dr. Oz episode that featured an adoptee who found her birth family with Cece’s help. Click the image to the left to go to the online clip of the episode.

A simple explanation of the methodology is as follows. An adoptee tests their autosomal DNA at all three major companies (see my DNA testing page) and then uploads those results to all the free third party sites as well. Sometimes they get lucky and find a close family member who has tested and who is willing to help. More often they must look at the family trees of their 2nd and 3rd cousin matches to see what ancestors are in common. Once a shared ancestral couple is found, they build a family tree forward in time, looking to see if one of the couple’s descendants was in the right place at the right time to be the adoptee’s parent.

To learn more about this methodology come to the conference, or buy the videos of it, or go to DNAadoption.com or join DNA detectives at Facebook and read through the files there. Or do all of those things.
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