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Archiver > GENEALOGY-DNA > 2003-05 > 1053788819


From: "John F. Chandler" <>
Subject: Re: [DNA] My Y-DNA Haplogroup Was Confirmed to be R1b by SNP Test
Date: Sat, 24 May 2003 10:55 EST
In-Reply-To: alanbrookwall@btopenworld.com message <000d01c321e4$4b993de0$487c8351@tinypc> of Sat, 24 May 2003 05:05:30 -0600


Alan wrote:
> There is a shortage of scientific papers showing how we can deduce our
> personal UEPs from our haplotypes. James Wilson et al, 2001, could help you
> if you are R1b*; this is mainstream M173, and deduced from
> DYS388,393,392,19,390 and 391.

No, you cannot "deduce" your haplogroup from your haplotype. There are
two reasons why it's impossible: first, think back to the time when the
defining SNP mutation appeared -- it occurred in exactly one man, whose
offspring have since then spread out to become a large population, but
that one man presumably had male relatives with essentially the same
haplotype. If there are any direct descendants of those relatives, they
are indistinguishable in terms of their haplotypes. Second, if the
defining mutation occurred, say, 30,000 years ago, there has been enough
time for 2-3 mutations on every STR locus since then. Some loci will
be found to match the ancestral values because of two canceling
mutations, but many others are going to be two steps away, and some
three steps away. Small percentages are going to be even farther.

You can guess your haplogroup, but that's about the limit.

John Chandler

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