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Archiver > GENEALOGY-DNA > 2011-08 > 1312320786


From: (John Chandler)
Subject: Re: [DNA] How to count an insertion at DYS 464?
Date: Tue, 2 Aug 2011 17:33:06 -0400
References: <001901cc50cf$ff712800$0201a8c0@ownere6db11aea><CAA-Ub_A+Niw1C--VaSXdG90GgiB5Xc3zeS+GD7ZP9mHyatWqLw@mail.gmail.com>
In-Reply-To: <CAA-Ub_A+Niw1C--VaSXdG90GgiB5Xc3zeS+GD7ZP9mHyatWqLw@mail.gmail.com>(message from Ann Turner on Tue, 2 Aug 2011 11:41:20 -0700)


Ann wrote:
> Have both parties had the kind of testing that would reveal the insertion?
> Both would have equal height peaks for 14 and 15.

Indeed, there are at least two scenarios in which the two men would
turn out to have the same inventory for DYS464. For example, if the
one with 4 supposed copies was tested several years ago, that might
have been before FTDNA decided to try harder to detect non-4-copy
situations. Also, detecting the difference between peaks a little on
the high side and peaks 50% high is a tricky business, and so the call
of 6 copies for the other man could turn out to be overzealous by a
small-but-crucial amount. It might be wise to subject both men to a
464X text to get an independent assessment of the numbers of copies,
as Ann hinted.

John Chandler

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