GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2010-03 > 1268615856


From: Steven Bird <>
Subject: Re: [DNA] Clades, Definitions, Discoveries, FTDNA
Date: Sun, 14 Mar 2010 21:17:36 -0400
References: <270548.86246.qm@web111316.mail.gq1.yahoo.com>
In-Reply-To: <270548.86246.qm@web111316.mail.gq1.yahoo.com>


That really is not going to happen. The mutation rate for SNPs is on the order of 1 time 10 to the negative 9th per generation. The whole point of a SNP is that it is a one time mutational event in human evolutionary history, occurring at one base pair out of about 3 billion base pairs total in the human genome, that will be passed down to all descendants of that individual. L21+ will only have occurred in the descendants of the first individual to have L21, the common ancestor. The man in J1 will not have this polymorphism.



Steve



>
> So if a SNP shows up at the same location as L21 on the y chromosome and has the same change in nucleotide base as L21, but occurs in a man SNP-tested as in haplogroup J1, does that make that man a member of the R-L21 clade?

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