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Archiver > GENEALOGY-DNA > 2010-03 > 1268629368


From: "Ken Nordtvedt" <>
Subject: Re: [DNA] Clades, Definitions, Discoveries, FTDNA
Date: Sun, 14 Mar 2010 23:02:48 -0600
References: <270548.86246.qm@web111316.mail.gq1.yahoo.com>, ,<SNT115-W100A5F4E30C0231B9E890ACC2E0@phx.gbl>, ,<016301cac3e3$fe0b33e0$5e82af48@Ken1>,<SNT115-W544368FA05A091575BBEABCC2E0@phx.gbl>,<01a401cac3f7$b5a9c120$5e82af48@Ken1><SNT115-W606798BDD05F5BAFB416AECC2E0@phx.gbl>


----- Original Message -----
From: "Steven Bird" <>
To: <>
Sent: Sunday, March 14, 2010 10:33 PM
Subject: Re: [DNA] Clades, Definitions, Discoveries, FTDNA


>
> There is on average one SNP for every 1000 base pairs in the human genome.
> Most of them are useless for purposes of genetic genealogy. What is your
> point?

[[ You beat me to the punch; I was going to ask what's your point? The
whole genome is not part of this discussion of y snps. I believe there are
only about 25 million practical base pairs on the y where we look for the
ysnps. The exact number 25 million is not important, but that's the ball
park. The number of snps already found on the y tree is a tiny, tiny and
unimportant fraction of all the snps sitting there in the y tree.

If the 25 million number of useful base pairs on the y chromsome is about
right, and we concluded in the previous post that EACH of these base pairs
has mutated many times in the y tree, the total number of snp mutational
tags sitting on the y tree is "many times 25 million" Just think of all the
snp uncovering yet to do. Ken ]]



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