I recently received an interesting question from a reader (see this comment) about 23andMe’s Relative Finder, and thought it would be worth sharing the question and my answer with all my readers.
I’m a man who recently took a 23andMe test, and I have a question about Relative Finder. Another man who I match on 36 of 37 Y-DNA markers via Family Tree DNA also took a 23andMe test. We believe that we are third cousins, but this individual does not show up as related in Relative Finder, nor does he show any similarities in the Family Inheritance section. Does this mean that we are not related at all?
If two individuals do not share any DNA in the Family Inheritance section of 23andMe or do not appear as relatives in Relative Finder, this absolutely does not mean that they are not or cannot be relatives. It does suggest, however, that the two individuals might not share any DNA. Although your Y-DNA test suggests that you share a recent common male ancestor, it appears that apart from your Y chromosomes you do not share any other DNA.
Linda Avey, co-founder of 23andMe, has started a new blog entitled The Life & Times of Lilly Mendel. I’m looking forward to some interesting reading as Linda establishes the Brainstorm Research Foundation dedicated to the study of Alzheimer’s disease.
On July 8th, Ancestry.com hosted a webinar called “Genetic Genealogy Made Easy.”Â The webinar is now posted and can be accessed at any time.Â One great thing about a webinar is that it can be multimedia; indeed, this webinar uses both slides and video.
The presentation is pretty basic, but a good source of information for people who are new to genetic genealogy.Â The following topics are covered, according to the site:
- DNA testing for genealogy works–in easy terms.
– To understand and apply your results to grow your tree.
– Ancestry.com DNA testing can continue to pay off for years.
– Women can benefit from a paternal lineage test.
– To use Ancestry.com DNA features: Groups, Transfer to Tree, and Ancient Ancestry.
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:
A new article in Ancestry Magazine, “Meeting My New Family,” details a recent meeting of genetic relatives in Chicago.Â 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).Â 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 mothersâ€™ mothers came from the HV branch. Our fathersâ€™ fathers came from the G group.”
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 his actual identity with the combination of DNA research and traditional genealogical research). If the unknown parent had been the mother, the daughter would possess the unknown parent’s mtDNA and a remote but possible chance of finding an mtDNA match and using traditional genealogical techniques to identify the mother.
On September 5th at the 2008 Federation of Genealogical Societies Conference in Philadelphia, Pennsylvania, I was interviewed by Dick Eastman.Â 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).
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.
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.”
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 family mystery? You founded DNA Heritage in 2003. What led you to create the company? Can you also tell us a little bit about Ybase?