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Ancestry's Beta DNA Roll-out

Ancestry's Beta DNA Roll-out

Posted: 8 Mar 2012 2:07PM GMT
Classification: Query
Has any received notification to provide feedback on ancestry.com's "About AncestryDNA Beta" page? I don't see any posted results to provide feedback against?

Thanks in advance.
Marcus King

Re: Ancestry's Beta DNA Roll-out

Posted: 9 Mar 2012 5:58AM GMT
Classification: Query
The results are starting to roll-out. Mine aren't posted yet either, but there are a couple blog posts with screenshots of the autosomal test results:

http://www.yourgeneticgenealogist.com/2012/03/ancestrycoms-a...

http://genejourneys.com/2012/03/06/my-free-ancestry-com-dna-...

Re: Ancestry's Beta DNA Roll-out

Posted: 9 Mar 2012 2:55PM GMT
Classification: Query
Is there a place where we can discuss the results here on the forum? I sent feedback with regard to my results, but I would like to be able to hear from other members about how their results turned out... I am a bit confused about mine with how different my pedigree ethnicity is from my genetic ethnicity.

Re: Ancestry's Beta DNA Roll-out

Posted: 9 Mar 2012 7:59PM GMT
Classification: Query
This is as good a place as any to discuss the results, although this whole thread should probably be moved to the "General Research" topic instead of "Announcements of DNA Projects." My results still aren't posted.

Ancestry's FAQ on DNA is pathetic. They haven't done a good job explaining Y-DNA or mtDNA, and autosomal DNA testing is even more complex.

We only inherit half of each parents' autosomal DNA, so half the genetic information is "lost" each generation. (If you have siblings, more will have been preserved.) After 5-6 generations, it's entirely possible you didn't inherit any detectable DNA from some ancestors. That's one reason the bio-geographical ancestry (BGA) analysis of your autosomal DNA may not seem intuitively correct.

Another has to do with admixture. If your ancestors all lived in the same, small village for generations, your BGA analysis would be straight-forward (and similar to every other village resident). But in populations with high degrees of admixture (e.g. Americans), it's difficult to distinguish between different ethnic backgrounds. Since we have two copies of each chromosomes--one from each parent--the combination of DNA from each can appear very different than either by themselves.

Re: Ancestry's Beta DNA Roll-out

Posted: 9 Mar 2012 8:25PM GMT
Classification: Query
Thanks for the reply and the information, that is helpful. Here is what I have posted elsewhere in an effort to understand my results:

I looked at my results yesterday but was disappointed that my pedigree ethnicity was so different than my genetic ethnicity, enough to think perhaps there is a problem with my results. For instance, my results state that my genetic ethnicity is 91% British Isles, 6% Russian/Persian/Turkish, and 3% Other. This does not match my pedigree. My pedigree on both sides of parents is predominantly French, as most of my ancestors were French colonists of Canada, Acadia, and Louisiana. Out of the nearly 3,000 people in my family tree, I have none that are from the Russian/Persian/Turkish part of the world… that was a total surprise (although my surname is from southern Spain, perhaps there was a migration or something to that area from way back). Based on my pedigree, I would expect my genetic ethnicity to be around 50-60% Western or Southern Europe and the rest to be British Isles. I just find it really odd that I received no “hits” for Western Europe (France/Spain) given this is the predominant portion of my family tree. I sent feedback to Ancestry, but I was curious if anyone else has something similar to this or could anyone provide some insight for me?

I just wonder if since most of my ancestry is from French colonists of North America, then perhaps they are confusing the results with the British colonists of North America? I had one person that was a 4th cousin match, and in fact we had some common ancestors. Based on their family tree, many of their ancestors were French Canadian and Louisianan as were mine and their results were 86% British Isles, 6% Southern European, and 8% Other… which again, seems kind of odd.

Re: Ancestry's Beta DNA Roll-out

Posted: 10 Mar 2012 5:35AM GMT
Classification: Query
In the absence of a real FAQ, I assume their BGA is similar to FTDNA's and Dr McDonald's. If so, draw a line between the British Isles and the Caucasus (the middle of the region highlighted for "Russian/Persian/Turkish" in this blog post: http://www.yourgeneticgenealogist.com/2012/03/ancestrycoms-a...). Then pick the spot 6% of the length from the British Isles, which would place your genetic average somewhere around Luxembourg.

Otherwise, your results may simply be similar to British Isles based on the underlying Celtic and Germanic ancestry in both places. Or the particular mix of your DNA could be confounding the algorithm to come up with a better fit.

Re: Ancestry's Beta DNA Roll-out

Posted: 10 Mar 2012 12:45PM GMT
Classification: Query
It also depends on how large and varied their database is. If it is heavily weighted toward one ethnicity with very little representation from another, your results can be skewed. As in all DNA testing, the size of the database is probably at least as important as any other factor.

Re: Ancestry's Beta DNA Roll-out

Posted: 10 Mar 2012 2:21PM GMT
Classification: Query
In this case, the size of the database is irrelevant. Most BGA analyses compare only against carefully sampled populations, with local ancestry for a few generations. If they used the customer database for BGA, the analysis would be about as reliable as any typical unsourced Ancestry member tree, chosen at random.

Re: Ancestry's Beta DNA Roll-out

Posted: 12 Mar 2012 9:17PM GMT
Classification: Query
I never got an e-mail saying my results are available but when I go to the DNA tab there are some results showing up. The map has me as 96% british isles when 1/4 of my ancestors are French Canadien (200 years in the same area, lots of intermarriage).

All the possible cousins listed are 5th-8th cousins with a 50% accuracy.

If I select "download all Y results" i get a string of letter/number combos in collumns A-CP (68 columns) with no headings or explinations.

"Download all mtDNA results" an empty spread sheet opens.

I hope there will be something more coming and an e-mail with some sort of explination.

Re: Ancestry's Beta DNA Roll-out

Posted: 13 Mar 2012 4:40PM GMT
Classification: Query
I downloaded a spreadsheet page as well....but after looking at it a very long time I think the row of "results" is actually the Headings and that results should fall into the second row? I'm not getting a map, just a statement asking for feedback. Hard to provide feedback at this point.

My feedback would be that I think the roll out has been a little "choppy" at best.
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