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Archiver > GENEALOGY-DNA > 2007-01 > 1169779510


From: "Lawrence Mayka" <>
Subject: Re: [DNA] Worth getting yet more extras?
Date: Thu, 25 Jan 2007 20:45:10 -0600
In-Reply-To: <526514.35850.qm@web31501.mail.mud.yahoo.com>


> [mailto:] On Behalf Of Jonathan Day
> Do you know of any good calculators for distances that
> would presumably be in the 3-7 marker range, for 67
> markers?

I think that FTDNA's Y-DNA Matches tab lists 67-marker matches up to 6 steps
away, but that might only be for members of a project you both belong to.
(So be sure that you and your match are both in, say, the I1a Project.) You
can run FTDNATiP on anyone listed on your Y-DNA Matches tab.

A project administrator can run FTDNATiP on any two members of the project,
regardless of genetic distance. (Of course, very large distances become
almost meaningless.)

And of course, many researchers believe that FTDNATiP is too optimistic.
Perhaps one simple compromise is to quote the 50th to 95th percentile as the
interval. So if FTDNATiP says that the 50th percentile is a Time to Most
Recent Common Ancestor of 28 generations (840 years), you might interpret
that as roughly 800-1700 years.



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