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More X-Chromosome Charts

Last month I wrote “Unlocking the Genealogical Secrets of the X Chromosome” and posted a few charts that show the inheritance of the X-chromosome through 8 generations.  I thought these charts might be helpful since inheritance of the X-chromosome can be difficult to understand without seeing it.

New Chart with Ahnentafel Numbers

Since posting the article, two new charts have been created using the originals.  I made one, and the other was made by Rodney Jewett (who gave me permission to re-post the chart here) and posted at dna-forums.org.

Mr. Jewett added the Ahnentafel numbers of contributing X-chromosome ancestors to the chart.  Using these numbers, an individual can simply create a numbered Ahnentafel report to identify X-chromosome contributing ancestors using this chart:
NewChart4
Note that Ann Turner also has a text file of … Click to read more!

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New Genetic Genealogy Article at Ancestry Magazine

A new article in Ancestry Magazine, “Meeting My New Family,” details a recent meeting of genetic relatives in Chicago.  The author is Howard Wolinsky, who has written other articles in the field of genetic genealogy (see, for example, an article in EMBO about 2 years ago).  As Howard describes, the meeting wasn’t a traditional family reunion:

“We are a new kind of cousin. Until a few days ago, we were strangers who just happened to have had our DNA analyzed. Then we discovered we matched one another to varying degrees. Most of us have common Jewish connections. And we learned that we come from relatively rare branches of the human DNA tree. Our mothers’ mothers came from the HV branch. Our fathers’ fathers came from the G group.”

The full text of the article is … Click to read more!

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Identifying an Unknown Parent Using Genetic Genealogy

iStock_000007020771XSmall Last week, Randy Seaver of Genea-Musings posed a genetic genealogy question on his blog.  I posted a possible solution in the comments there, but I am asked this question regularly and thought I would discuss it here.

At a recent meeting that Randy attended, a woman in the audience asked the speaker:

“I don’t know who my father is. He and my mother had relations in Naples, Italy back in the 1950′s and I was born. I have no siblings. My mother did not tell me his name and there is no father’s name on my birth certificate. Can DNA research help me?”

This particular situation is exceptionally challenging.  If the child had been a boy, he would have his father’s Y-DNA and a decent chance at identifying his father’s surname (and thus could perhaps further elucidate … Click to read more!

Dick Eastman Interviews The Genetic Genealogist at FGS 2008

On September 5th at the 2008 Federation of Genealogical Societies Conference in Philadelphia, Pennsylvania, I was interviewed by Dick Eastman.  In the interview we discuss my blog, DNA testing in general, and my free ebook, “I Have the Results of My Genetic Genealogy Test, Now What?” (which is available for download in the sidebar of the blog).

If the player doesn’t appear in the post, the interview is available here (http://rootstelevision.com/players/player_conferences.php?bctid=1811559654).  It was a pleasure to meet and talk with Dick, and I hope you enjoy the … Click to read more!

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TGG Interview Series VI – Ann Turner

Ann Turner has been a member of the genetic genealogy community since 2000, and during that time she has made great contributions to field (as will become obvious from her interview). According to her brief biography at the Journal of Genetic Genealogy:

Ann Turner is the founder of the GENEALOGY-DNA mailing list at RootsWeb and the co-author (with Megan Smolenyak) of “Trace Your Roots with DNA: Using Genetic Tests to Explore Your Family Tree.” She received her undergraduate degree in biology in 1964 and her M.D. from Stanford University in 1970. In recent years, she developed software for neuropsychological testing and wrote utility programs for the PAF genealogy program. One of these utilities provided a way to split out all people in a database who were related via their mitochondrial DNA, six years before mtDNA tests were commercially available. The inspiration for this feature came from the (then) forward-looking predictions of Dr. Thomas Roderick, now associate editor of JoGG.

As stated in her bio, Ann is the co-author of “Trace Your Roots With DNA”, the premiere book on genetic genealogy (the other co-author, Megan Smolenyak Smolenyak, was featured earlier in this series). Ann continues to contribute frequently to the GENEALOGY-DNA mailing list at Rootsweb, and has been especially active in genetic genealogical analysis of new SNP testing by companies such as 23andMe and deCODEme. Once again, I highly recommend subscribing to the GENEALOGY-DNA mailing list if you are interested in genetic … Click to read more!

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TGG Interview Series V – Whit Athey

The name Whit Athey is undoubtedly very familiar to many genetic genealogists. Whit’s Haplogroup Predictor, used to predict an individual’s paternal haplogroup based on DNA test results, is one of the most valuable online (and FREE) tools for genetic genealogists.

Among Whit’s many contributions to the field, he is also the Editor (and frequent contributor) of the Journal of Genetic Genealogy. From his biosketch:

“Whit Athey is a retired physicist whose working career was primarily at the Food and Drug Administration where he was the chief of one of the medical device labs. He received his doctorate in physics and biochemistry at Tufts University, and undergraduate (engineering) and masters (math) degrees at Auburn University. For several years during the 1980s, he also taught one course each semester in the Electrical Engineering Department of the University of Maryland. Besides his interest in genetic genealogy, he is an amateur astronomer and has his own small observatory near his home in Brookeville, MD.”

In the following interview, we talk about Whit’s introduction to genetic genealogy, the creation of the JoGG, and Whit’s thoughts about the future of the field.

TGG: How long have you been actively involved in genetic genealogy, and how did you become interested in the field?

Whit Athey: I have always been interested in molecular biology, and my graduate work, … Click to read more!

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TGG Interview Series IV – Alastair Greenshields

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Today’s interview is with Alastair Greenshields, founder of the genetic genealogy testing company DNA Heritage. Alastair is also the founder of Ybase, a Y-DNA database. I recently wrote about a helpful and informative video series by Alastair for DNA newbies (see “New Videos for Genetic Genealogists“).

In today’s interview, I ask Alastair about his introduction to genetic genealogy, some of the ethical issues raised by the recent launches of personal genomics companies, and about the future of genetic genealogy.

TGG: How long have you been involved in genetic genealogy, and how did you become interested in the field? Have you undergone genetic genealogy testing yourself? Were you surprised with the results? Did the results help you break through any of your brick walls or solve a … Click to read more!

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Interview Series III – Terry Barton

imageTerry Barton is co-founder of WorldFamilies.net (along with Richard Barton), a website devoted to helping genealogists host Surname, Geographic, or Haplogroup Projects and learn more about genetic genealogy. When I began the Bettinger Surname DNA Project, Terry helped me through the entire process of setting up the site. From the WorldFamilies website:

“Terry is co-founder of WorldFamilies.net, President of the Barton Historical Society (BHS) and Co-Leader of the 193 member Barton DNA Project. He is the “Line Leader” for the Thomas (1,2,3) Barton family of Stafford Co VA and for the David Barton married Ruth Oldham family. He has made a number of presentations about using DNA in Genealogy, the Barton DNA project and his great-grandparent’s “Barton House” and has written many articles for the BHS Newsletters and website.”

In the following interview, I ask Terry about … Click to read more!

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Interview Series II – Megan Smolenyak Smolenyak

image If you’ve ever even thought about testing your own DNA for genealogical purposes, then you are almost guaranteed to have heard of Megan Smolenyak Smolenyak. Megan is the Chief Family Historian and North American spokesperson for Ancestry.com, as well as the co-founder of Roots Television, an online channel of genealogy and history-oriented programming. Additionally, Megan is the co-author of “Trace Your Roots With DNA”, the premiere book on genetic genealogy (the other co-author, Ann Turner, will be featured later in this series).

Megan blogs about genetic genealogy and other genealogical topics at Megan’s Roots World (which I highly recommend adding to your feed reader or daily reading list). In the following interview, Megan talks about her introduction to genetic genealogy, about the field as it stands … Click to read more!

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Interview Series I – Bennett Greenspan of Family Tree DNA

image Genetic genealogy has been commercially available since 2000, and in the last 8 years many genealogists have used this new tool to learn about their ancestry. Over the course of the next two weeks, I will be sharing interviews I recently conducted with 9 individuals who have had a huge impact on the field of genetic genealogy. The list includes – in the random order that their interview will appear – Bennett Greenspan, Megan Smolenyak Smolenyak, Terry Barton, Alastair Greenshields, Whit Athey, Ann Turner, Katherine Hope Borges, Max Blankfeld, and Ana Oquendo Pabón.

Just a quick disclaimer about the list of interviewed individuals before I begin this series. Genetic genealogy has become the valuable tool that it is due to the efforts of many … Click to read more!