Archiver > GENEALOGY-DNA > 2010-03 > 1268713006

From: Al Aburto <>
Subject: Re: [DNA] Clades, Definitions, Discoveries, FTDNA
Date: Mon, 15 Mar 2010 21:17:18 -0700
References: <>,<SNT115-W100A5F4E30C0231B9E890ACC2E0@phx.gbl>,<016301cac3e3$fe0b33e0$5e82af48@Ken1><SNT115-W196CFB24CCDD653D7C3D50CC2E0@phx.gbl> <01ba01cac3fb$87b368d0$5e82af48@Ken1><01d101cac3ff$6a024190$5e82af48@Ken1>
In-Reply-To: <01d101cac3ff$6a024190$5e82af48@Ken1>

What does this mean for the future, say, when we'll have the whole
Y-chromosome sequenced at reasonable cost?
Will Y-STRs be out?
Instead of a 67 Y-STR set will FTDNA offer a detailed "Y-SNP" set (like
we get for the mtDNA FGS, but much, much more)?

> On 3/14/2010 10:21 PM, Ken Nordtvedt [responding to Steven Bird] wrote:
>> [[ For purposes of the Y tree we are only interested in the mutations at
>> base pairs on the y chromosome. I'll take 25 million base pairs in the y
>> as
>> the practical region.
>> 67 million males were born last year. EACH base pair on the y has your
>> one in a
>> billion chance of mutating. So EACH base pair had a .067 chance of
>> mutating
>> last year. So EACH base pair had a chance of approximately ONE to mutate
>> over about 16 years. That's half a generation --- so in half a generation
>> EACH and every practical snp site on the y chromosome has on average
>> mutated
>> once. I still don't know why you are bringing the 3 billion base pairs of
>> the whole genome into the picture. The snps used for the male y tree are
>> only from the y chromosome. Ken ]]

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