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Archiver > GENEALOGY-DNA > 2004-06 > 1086957419


From: "William Hurst" <>
Subject: Re: [DNA] haplogroups defintions
Date: Fri, 11 Jun 2004 08:36:59 -0400
References: <29.59d8784a.2dfa8230@aol.com> <20040611052448.A37137@badger.tltodd.com>


Terry wrote:

> As the
> group admin I may go ahead and do the SNP test so we have at least
> one person in our group who has had it.

That's what I did and why I did it, although I'm not the group
administrator. Just curious, I guess.

> I would presume that all
> others who match me in the STR tests would then also be able to
> say with 100% confidence that they are from the same haplogroup.
> Correct me if I'm wrong as this is all new to me.

You are correct. After I took the SNP test, I asked FTDNA this very question
and they confirmed what you said. As I remember, they said that even those
with the same surname, but who were one or two markers off, could still
consider themselve proven R1b. They also said that a person with a different
surname, but with a 25/25 match, would also be R1b - again, if I remember
correctly.

>
> Is this why they estimate that a person is in haplogroup I but if the SNP
> test is run they can pinpoint it down to haplogroup I1b1a for example?

My understanding is that if they predict you are I, they give the SNP test
for I, not I1b1a or any other subclade. They predicted that I was R1b, and
after they SNP test said I was definitely R1b. I do notice there are a few
on ysearch who are listed for R1b subclades. How they learned that I don't
know.

>
> For the SNP tests do you get the results back for the markers that
> were tested or only a specific haplogroup name?

For R1b they tested me for marker P25. Finding that I was positive for P25,
they said I was R1b.

Bill Hurst

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