GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2006-09 > 1159637096


From: James Blair <>
Subject: Re: [DNA] Which mtDNA test for insight into ethnic origins?
Date: Sat, 30 Sep 2006 10:24:56 -0700 (PDT)
In-Reply-To: <451E7639.9050203@scs.uiuc.edu>


Thanks. That looks like what she wants.

Thanks also for the warning about how much or how little
can be learned from this kind of test. I'll pass that on
to my sister also.

Much appreciated.

James


--- Doug McDonald <> wrote:

> James Blair wrote:
> > To tell the truth that's what I thought. But my sister
> is
> > under the impression (saw something on tv about it)
> that
> > it's possible to get a DNA report which will say (for
> > instance) that a person is 70% European, 20&
> Sub-Saharan
> > African, and 10% Native American. Is there any test,
> or
> > combination of tests, that could produce such a report?
> >
>
> Indeed there is, and the best one is called "DNAPrint".
>
> HOWEVER: note that it is imprecise. If it says 10% NA it
> REALLY means that it could, with fairly good odds, be
> anywhere from 0 to 20%. If it says 15% , then it is very
>
> unlikely to actually be zero.
>
> Thus, it can with very high probability unambiguously
> detect
> a single pure NA grandparent if all other ancestors are
> European, it can detect fairly cleanly one NA great
> grandparent from all other great grandparents being
> European, or two great great grandparents being NA, BUT
> if
> you expect only one great great grandparent being NA,
> then
> the results will likely be sufficiently murky as to be
> useless.
>
> Doug McDonald
>
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James

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