GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2011-02 > 1297556538


From: Ann Turner <>
Subject: Re: [DNA] x chromosome puzzle
Date: Sat, 12 Feb 2011 16:22:18 -0800
References: <8CD9917D8B88AFE-1D14-1ED72@Webmail-d115.sysops.aol.com>
In-Reply-To: <8CD9917D8B88AFE-1D14-1ED72@Webmail-d115.sysops.aol.com>


I presume they used the same method they did for the autosomes: generate
artificial pedigrees (descendencies) with real genotype data from the
customer pool. Randomly recombine the segments for each succeeding
generation. Then select a threshold for different levels so that most (95%?)
of the shared segments can be traced back through the pedigree.

Ann Turner

On Sat, Feb 12, 2011 at 2:03 PM, Kathy Johnston <> wrote:

>
> I don't see how 23andMe can predict 4th cousins on the X chromosome with
> any degree of accuracy.
>
> Kathy J.
>
>

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