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Archiver > GENEALOGY-DNA > 2011-01 > 1294784194


From: "Diana Gale Matthiesen" <>
Subject: Re: [DNA] How many realistic locations on the Y for SNPs?
Date: Tue, 11 Jan 2011 17:16:34 -0500
References: <CCC150916E8E4411AFE12370BBEEE726@PC> <001f01cbaeb0$4c9bff00$c2482dae@Ken1> <63975AE0-4907-4B8A-93D3-90B240793C8A@verizon.net> <002201cbaef0$22bda8b0$c2482dae@Ken1> <B62B7165-4267-4A0D-B8C4-7934D3BA2908@verizon.net> <008901cbaf4b$951943a0$c2482dae@Ken1> <F6FCB88D-57FC-4F12-8253-A278A9A3DFCE@verizon.net> <013201cbaf68$3c344830$c2482dae@Ken1> <52AE5437-01C7-424A-89DD-C36D016506FE@verizon.net> <019b01cbaf7c$82096390$c2482dae@Ken1> <CAC021EE-9E80-4226-9157-2A830A1A9A75@verizon.net> <021e01cbaf8f$643721f0$c2482dae@Ken1> <COL118-W42DB12E03AFE2E2BCDDD64A00D0@phx.gbl> <002601cbaf9c$5b51af30$c2482dae@Ken1> <COL118-W2972792AD05AE41FB629B6A00D0@phx.gbl> <AED10222-4F0C-4633-A86F-ED70B093F47E@verizon.net> <1C284B4A-C38B-4654-B2A9-DB97BCAA4BA5@vizachero.com> <003e01cbb1b5$702dd580$50898080$@dgmweb.net><741128D5-5C09-4A84-9934-3778BE1641EE@verizon.net>
In-Reply-To: <741128D5-5C09-4A84-9934-3778BE1641EE@verizon.net>


Well, if -- for the sake of argument -- we agree that each male birth represents
one SNP and the current population of men is 3 billion, and they say that living
males represents 1/3 of all the males who've ever lived, then we are talking
about 9 billion forks. I'm in no way suggesting such a tree would be in any way
practical, even if we ever had sufficient knowledge to construct it. However,
that wasn't my point, and I'm sorry if my point wasn't clear...

Vince chided you for being wrong about "forks," I was simply agreeing with you
and disagreeing with Vince. As you so wish, I agree not to message you again.

Diana

> -----Original Message-----
> From: [mailto:genealogy-dna-
> ] On Behalf Of Jim Bartlett
> Sent: Tuesday, January 11, 2011 3:36 PM
> To:
> Subject: Re: [DNA] How many realistic locations on the Y for SNPs?
>
> Diana
>
> Thanks for your response to me. As I read and responded to Vince's post, I
gradually
> began to understand the point he was making. I am not knowledgeable enough to
debate
> the fine points of the terminology - I am trying to understand what actually
happens, and
> how do we look at SNPs today and use them to build the tree.
>
> By your description, every man added a SNP somewhere on the Y, and there
should then
> be 50 billion tines. This is clearly unwieldy, and not helpful to us. Since we
will probably
> never be able to test the 47 billion dead men, there's no sense to go there. I
want to
> focus on what the data we have means, and what we can expect from it.
>
> I will agree to stay out of the terminology debate.
>
> Jim - Sent from my iPhone - FaceTime!
>

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