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Archiver > GENEALOGY-DNA > 2009-04 > 1239461848


From: "Tim Janzen" <>
Subject: Re: [DNA] WTY R1a
Date: Sat, 11 Apr 2009 07:57:49 -0700
In-Reply-To: <003c01c9baa8$468a2360$6400a8c0@Ken1>


Dear Lawrence and Ken,
I did some more thinking about this situation. The 20-30 SNPs per
million base pairs would actually be for a period of about 40,000 years
(from the present day back to the R-0 node (NOP, rs2033003) rather than
15,000 years as I stated last night. The average of 20-30 SNPs per million
base pairs for the Yoruba and Chinese shared SNPs would be going back to the
R-0 node (NOP, rs2033003) about 40,000 years ago. Thus Ken is correct in
that my estimate last night was too high by a factor of 2-3. Thus I agree
with Ken's estimate that there will be about .3 SNPs found per 5000 years
per 100,000 base pairs for a stable section of the Y chromosome.
Sincerely,
Tim

-----Original Message-----
From:
[mailto:] On Behalf Of Ken Nordtvedt
Sent: Saturday, April 11, 2009 6:20 AM
To:
Subject: Re: [DNA] WTY R1a

Seems high to me by factor 2 or 3 unless you know mutation rate is
correspondingly high there.


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