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Ancestry DNA Question

Replies: 8

Re: Ancestry DNA Question

Posted: 10 Oct 2013 7:07AM GMT
Classification: Query
I gather you refer to Y STR tests (Short Tandem Repeat), which measure the length of a fragment of DNA, not specific base pairs. The autosomal DNA test uses an entirely method, which does look at specific base pairs. If you are interested only in your straight paternal line, the Y STRs are a very good approach, and FTDNA (as mentioned above) is considered the best company for that type of test. It can measure as many as 111 STRs.

However, autosomal DNA doesn't blend like paint. It's more like mixing red and yellow jelly beans than red and yellow Jello. The DNA is chopped up with each generation, but the pieces retain their identity and can sometimes be traced to a specific ancestor (with luck and hard work). If you're hoping to find a match who knows more about your brick wall than you do, the autosomal DNA might identify such a cousin from any line of descent. These animations show how that works:

http://www.smgf.org/pages/animations.jspx
SubjectAuthorDate Posted
Lee_Maynus 10 Oct 2013 3:45AM GMT 
DPotts57 10 Oct 2013 9:59AM GMT 
APTurner 10 Oct 2013 1:07PM GMT 
S_H999 11 Oct 2013 5:16PM GMT 
Lee_Maynus 11 Oct 2013 6:45PM GMT 
MJ782 12 Oct 2013 5:34AM GMT 
Lee_Maynus 12 Oct 2013 7:01PM GMT 
Lee_Maynus 12 Oct 2013 8:49PM GMT 
APTurner 12 Oct 2013 10:12PM GMT 
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