DNA-R1B1C7-L Archives

Archiver > DNA-R1B1C7 > 2008-12 > 1229027869


From: "Sandy Paterson" <>
Subject: Re: [R-M222] L21
Date: Thu, 11 Dec 2008 20:37:49 -0000
References: <c6c.3cb6bef9.3672a284@aol.com>
In-Reply-To: <c6c.3cb6bef9.3672a284@aol.com>


I haven't done the calculations yet, I'll see if I can have a go tomorrow.

But yes, I'm pretty sure L21 will come out being more than twice as old as
M222.

Combining (L21+,M222-) and (L21+,M222+) and having a go at trying to
determine a TMRCA would be an meaningless exercise though. The first ever
M222+ person would have had a haplotype drawn at random from a pretty wide
range. If he happened to be near modal for L21, you'd get an answer fairly
close to that of L21. If he happened to be far from modal, that would
inflate the variance and give a spurious answer way in excess of the age of
L21+.


Sandy



-----Original Message-----
From:
[mailto:] On Behalf Of
Sent: 11 December 2008 17:06
To:
Subject: Re: [R-M222] L21

In a message dated 12/11/2008 10:20:37 A.M. Central Standard Time,
writes:

Although they are all present, they are present in quantities so low that
makes it very difficult to believe that L21+ is a parent of M222+.
Ancestral
to, possibly. Parental to, I doubt.


L21 is ancestral and parental to M222+ until another SNP comes along. The
fact that M222+ is so radically different from the rest of L21 might just
speak to the age of L21. I wonder if anyone out there has taken the
L21+/M222+
samples and found a TMRCA estimate for the entire cluster? The latest
estimates for M222+ per David Wilson center on 1,500 to 2000 years BP. I'd
be
willing to bet L21 is twice as old at a minimum for the haplotypes to have
grown
so far apart.
The other SNPS downstream of L21 are basically meaningless at present.


John




**************Make your life easier with all your friends, email, and
favorite sites in one place. Try it now.
(http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000
010)
R1b1c7 Research and Links:

http://clanmaclochlainn.com/R1b1c7/
-------------------------------
To unsubscribe from the list, please send an email to
with the word 'unsubscribe' without the
quotes in the subject and the body of the message

This thread: