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Archiver > GENEALOGY-DNA > 2011-08 > 1312340415


From: "Joe Fox" <>
Subject: [DNA] How to count an insertion at DYS 464?
Date: Tue, 2 Aug 2011 20:09:13 -0700


John, Gareth, Kirsten,

The first test was done in October 2008 and was 14,14,15,15. The other was just completed and was 14,14,14,15,15,15 so you may well have a point, John.

As for 464X, DYF399X and/or DYF371X testing, I'll raise the issue with them but I really think we are all convinced there is a match here and the GD is a secondary issue. If we get more of this clan in the project this may be the thing to do.

Thanks, again

Joe Fox
Lafayette, CA

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

They are hg I so the DYS464X test wouldn't necessarily add information about the number of copies (all the copies would be "g" type).

DYF399X and/or DYF371X would be better.

Gareth

Thomas has said that when the DYS464X test is analyzed, the results for DYF399X are viewed to help with the analysis, even though the DYF399X results will not be reported unless the customer has ordered them. This increases the accuracy of DYS464X results relative to DYS464 results. So DYS464X testing does have value outside Haplogroup R1b, even if everyone outside R1b only has g type alleles. I wonder how many people are looking for c type alleles outside R1b.

Kirsten


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