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Archiver > GENEALOGY-DNA > 2008-06 > 1212754892


From: Vincent Vizachero <>
Subject: Re: [DNA] question about CMH cluster in J1
Date: Fri, 6 Jun 2008 08:21:32 -0400
References: <20080606115904.DA36732675A@ws1-8.us4.outblaze.com>
In-Reply-To: <20080606115904.DA36732675A@ws1-8.us4.outblaze.com>


Why suppose that GD=4 is the boundary? Why not 3, or 5? Or 7?

The boundary for an STR cluster must be set on some prior belief
about the age of that cluster, so feeding the boundaries back into a
TMRCA calculation will do nothing but reinforce the prior belief of
the researcher.

Vince


On Jun 6, 2008, at 7:59 AM, adam mofat wrote:

> In Krechner website, states that FTDNA claim that mutation rate for Y
> STRs are faster than thought, .004 not .002 .this makes a 6 STRs
> Haplotype in a MCRA who lived 3500 years ago, will include that
> Haplotype
> and 3 to 4 sister haplotypes ( a sister haplotype that contain at
> least 3
> matches and three STRs with only one step mutation.

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