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Archiver > GENEALOGY-DNA > 2004-12 > 1104258937


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] MRCA = 800 AD
Date: Tue, 28 Dec 2004 11:35:37 -0700
References: <OF9DDFAD62.9295D78E-ON85256F78.00638B66-85256F78.00643B78@downstate.edu>


The haplotypes are NOT identical. They differ by 6 markers. You can claim
them "close" by some definition, but certainly not identical. That's all I
was saying.

So the descriptive phrase should be "close bo descent" or "close by
whatever"
----- Original Message -----
From: "Nicholas Penington" <>
To: <>
Sent: Tuesday, December 28, 2004 11:13 AM
Subject: Re: [DNA] MRCA = 800 AD


> Ken,
> I agree, more or less, that these two don't share many genes, with
> the exception that there are supposed to be about 12 genes on the
> Y-chromosome if they do have a MRCA=800 AD they probably share at least
> these don't you think? This is why I think the Y-chromosome and the mtDNA
> represent a tangible inheritance. N.P.
>
> >Since there are 6 out of 25 differences I would not call the haplotypes
> "identical" by either descent or whatever people call the alternative. But
> using an average marker mutation rate of 1/300 (I think you slipped a
> digit), I estimate with 25 markers there should on average be a mutation
> every 12th generational transfer of the yDNA. In 90 such transfers the
> expected number should be 7 1/2, so you seem in the ballpark. But as I
> indicated a few times earlier in 2004, neither present day descendant
> should
> expect any of his genes to have originated from these Norman Viking
> brothers.
>
>
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