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Archiver > GENEALOGY-DNA > 2007-02 > 1170695847


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] DYS390m ?
Date: Mon, 5 Feb 2007 10:17:27 -0700
References: <001101c74945$331406b0$647ba8c0@thinkerone>


----- Original Message -----
From: "Robert Tarín" <>

They also stated DYS390m and -p
> segments discriminate Asians, Papuans, and Australians from each other and
> from Whites and Africans. They further state that the value of the four
> DYS390 segments has been neglected, probably because of ascertainment
> bias:
> in Whites, all segments but DYS390n are invariant. Maybe the various
> testing
> companies should make note of this and start segmenting these marker
> results. It could be very useful for analyzing population differences.
> Hopefully they are reading this.


What the heck is "ascertainment bias"?

Wait, how could all segments of DYS390 be invariant except 390n, when a
chart shows the highest mutation rate at 390m? I believe I saw mutations at
both "m" and "n" and shall look again to make sure.

Ken


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