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Archiver > GENEALOGY-DNA > 2008-05 > 1211417683


From: "Lawrence Mayka" <>
Subject: Re: [DNA] S21/S28 Split+m223 stuff
Date: Wed, 21 May 2008 19:54:43 -0500
In-Reply-To: <200805220012.m4M0BsTf023636@mail.rootsweb.com>


Actually, we do _not_ know that. If we imagine M269+(S21-,S116-) as a tree
trunk, we know only that a lineage branched off which eventually underwent
the S21 mutation, and another lineage branched off which eventually
underwent the S116 mutation. We don't know the order in which those two
lineages branched off from the trunk, nor do we know when the S21 and S116
mutations occurred, except that they must have occurred no later than the
corresponding MRCAs. Ken's web site had a picture of this, but I don't see
it there now.

This is true even if M269+(S21-,S116-) had later died out, but as a matter
of fact it lives on.

> [mailto:] On Behalf Of Tim Janzen
> I think that it is interesting that the MRCA for R1b1c9
> (S21+) is younger than the MRCA for R1b1c10 (S28+) even
> though we know that the S21 SNP occurred before the S28 SNP
> did.

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