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Archiver > GENEALOGY-DNA > 2004-06 > 1086924844


From:
Subject: Re: [DNA] haplogroups defintions
Date: Thu, 10 Jun 2004 23:34:08 EDT


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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