GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2011-01 > 1294183951
From: Dienekes Pontikos <>
Subject: Re: [DNA] How old is Y-Chromosome Adam?
Date: Wed, 5 Jan 2011 01:32:31 +0200
And, the discrepancy is 18-fold using fast/slow markers using Ken's
program as presented by Tim here, for the A/C comparison:
On Wed, Jan 5, 2011 at 1:27 AM, Dienekes Pontikos
> Ballantyne's spread was 20-fold using the 10 fastest/slowest markers
> as estimated by me, and 16-fold with the fast/slow markers as
> estimated by Tim in 2009 and 13-fold in 2010. It is still 7-fold when
> using 23 fastest vs. 23 slowest ones. So, even if all the slowest ones
> had 45% overestimate of the age (not true, as it is only 18% in one of
> the slow ones that Ken estimated at my request), then we are still
> left with a 4.5-fold discrepancy.
> And, all of this with the caveat that Ken's method is better than Ballantyne's.
> In short, the alleged underestimate of the mutation rate for slow
> markers contributes very little to the discrepancy.
> On Wed, Jan 5, 2011 at 1:19 AM, Vincent Vizachero <> wrote:
>> Well, don't leave without remembering that the fast markers are
>> underestimating TMRCA.
>> And remembering that Ballantyne's spread was more like 10-fold, not 20-
>> I'm sure some are sick of pointing it out, but I'm not sure it has
>> sunk in yet given what you write below.
>> On Jan 4, 2011, at 6:13 PM, Dienekes Pontikos wrote:
>>> I'll leave the subject by noting that for the slowest marker Ken's
>>> method gives a 45% faster rate, hence most of the ~20-fold difference
>>> in the age estimates of "Adam" when one uses the 10 slowest/10 fastest
>>> markers cannot be explained by the postulated underestimation of the
>>> mutation rate of slow markers.
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|Re: [DNA] How old is Y-Chromosome Adam? by Dienekes Pontikos <>|