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Archiver > GENEALOGY-DNA > 2003-10 > 1065192788


From: "Dennis Garvey" <>
Subject: RE: FW: [DNA] About the R1a1 findings on Y Chromosome
Date: Fri, 03 Oct 2003 07:53:08 -0700


10831b is the same as 10831.2.

We call this type of marker a Unique Event Polymorphism (UEP) because of the
assumption that these mutations are so rare that any mutation at a given
site could only have happened once in all of human history. This site,
SRY10831, is one of the exceptions to that "rule". At a point very early in
human history the base at this site changed from A to G. But much later
there was a second mutation at the same place that switched it back from G
to A. This second event is the one we are talking about - so it is called
10831b or 10831.2.

Dennis Garvey
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Y-Chromosome Haplogroup Website

http://freepages.genealogy.rootsweb.com/~dgarvey/DNA/markers.htm
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