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Archiver > GENEALOGY-DNA > 2004-06 > 1086949488


From: Terry Todd <>
Subject: Re: [DNA] haplogroups defintions
Date: Fri, 11 Jun 2004 05:24:48 -0500
References: <29.59d8784a.2dfa8230@aol.com>
In-Reply-To: <29.59d8784a.2dfa8230@aol.com>; from DNACousins@aol.com on Thu, Jun 10, 2004 at 11:34:08PM -0400


Thanks for the very good explaination. Somehow I was under the
impression that if I ordered the 37 marker test that it would
include everything because that was the best they offer from the
main ordering page. My results have been delayed so I had not seen
the additional offering after the STR tests had been run. 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. 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.

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?

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

Thanks,
Terry Todd


On Thu, Jun 10, 2004 at 11:34:08PM -0400, wrote:
> In a message dated 06/10/04 11:14:14 AM Pacific Daylight Time,
> writes:
>
> > I didn't see a SNP test at ftdna. What is it? How much does it cost?
> > What will it show besides haplogroup.
>
> SNPs (Single Nucleotide Polymorphisms) are mutations which occur very rarely,
> perhaps only once in all of human history. SNPs are the basis for the formal
> definition of haplogroups. Everyone who has the new version ("allele") belongs
> to the same haplogroup, because they inherited it from the same common
> ancestor, the founding father who lived thousands of years ago. The haplogroups
> really apply to "deep" ancestry -- you don't need to know your haplogroup if
> you're interested in making connections in a genealogical time frame, but many
> people are curious about ancient migration paths.
>
> You can only order the SNP test if you've had a 12-marker (or more) test at
> FTDNA, which uses STRs (more rapidly changing markers with names like DYS390).
> Then if you look at the Haplogroup tab on your personal results page, FTDNA
> predicts your haplogroup based on your STR results. People in the same
> haplogroup often have similar STR results. If you want to order the formal SNP test,
> you can do so from your personal results page. If FTDNA did not have a
> prediction for you, it would have to run dozens of tests and the cost would be much
> greater.
>
> Ann Turner - GENEALOGY-DNA List Administrator
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