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Archiver > GENEALOGY-DNA > 2009-07 > 1246562637


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] R1b Origins (was OurEuropeangeographicalblock. . .)
Date: Thu, 2 Jul 2009 13:23:57 -0600
References: <200907021810.n62IAl48029389@mail.rootsweb.com>


----- Original Message -----
From: "Tim Janzen" <>

It appears to me that the farther back in time you go, the more
> interclade TMRCA estimates underestimate the true TMRCA.
> Sincerely,
> Tim

Probably. But the underestimate is non-linear in percent with increasing
age.

"Percent" modification for 5000 year old clade or node age would probably be
1/4 that for 20,000 year old clade and 1/8 that for 40,000 year old clade or
node age



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