GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2009-12 > 1260973507


From: "Elizabeth O'Donoghue" <>
Subject: Re: [DNA] R-U152 and R-L21 on the European Continent- back mutations
Date: Wed, 16 Dec 2009 14:25:07 -0000
References: <4B264DA0.4020206@san.rr.com><200912150636.nBF6aIcW020798@mail.rootsweb.com><3C7226E21D8B42C3B704E165C522F268@john><004a01ca7d97$6c230ad0$6400a8c0@Ken1><B93DAFD942A74628B7E40B919226A0F0@john><01de01ca7e00$aa2bfdf0$6400a8c0@Ken1>
In-Reply-To: <01de01ca7e00$aa2bfdf0$6400a8c0@Ken1>


Ken commented:

So Tip gets more confused, in fractional terms of its predictions, by
randomness the
shorter the basic time interval of the tree under consideration --- whether
we are talking about back mutations, too many mutations, too few
mutations....

-----------------------------

This was years ago, but I recall discussing the use of the Tip calculator
with Eileen Krause in relation to my identification of the different tribes
of our O'Donoghues, which would go back 1000 years or more, and she said
that they were more secure in the accuracy of their calculations for a
genealogical time frame of 600 +/- years than they were for longer TMRCA's.

Elizabeth

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