Thanks Michael! Very interesting & exciting results. I very much liked your explanation. - Don
> On Aug 25, 2015, at 1:32 AM, Michael Cooley <michael_at_newsummer.com> wrote:
>
> I know this is difficult for most of you to understand. Let's try these
> bulleted points:
>
> - Y chromosome mutations occur at the birth of men along a male lineages
> on the average of one about every 150 years, roughly once every five
> generations.
>
> - Although we don't know the name of these ancestors, we can roughly tag
> every fifth or sixth ancestor in the lineage with the name of a SNP. In
> other words, SNP L448 was born with a specific individual in the
> neighborhood of 3200 years ago (according to yfull.com).
>
> - The Y chromosome is passed whole hog from father to son, right along
> with any mutations, generation after generation.
>
> In this way, all mutations in a lineage accumulate over the thousands and
> hundreds of thousands of years. That's why Don and I both have the YP355
> SNP (which came after L448) and the newly discovered YP4248, which the
> Hackett tester also has. Because we know the average rate of mutations, we
> can date the Cooley/Hackett split to about 1250AD.
>
> I've updated my table:
>
> http://ancestraldata.com/staging/cooley-hackett-SNP.html
>
> Remember, the pink box include the SNPs that only Don and Hackett shared.
> *Well, I now share them too.) In time, we'll find other testers (and
> surnames) who share them. After all, the string terminated in the 13th
> century.
>
> Don had six SNPs with whom he matched no one. Now, he and I match on 3 or
> 4 of them. Since we have a match, the SNP masters (who ever they are) will
> give them names and designate one of them as being representative of the
> block.
>
> This new block of SNPs began to emerge after the YP4248 block was fully
> formed. In other words, those three or four SNPs were acquired by our
> Cooley ancestors between c1250 and John Cooley's birth c1740, over a
> period of about 500 years. That works: 3 SNPs times 150 years is 450
> years.
>
> So, three or so of our Cooley ancestors who lived between 1250 and 1740
> had mutations at birth. We don't know their names, but we know something
> about their DNA.
>
> Additionally, I have two SNPs not matched with Don. These would have had
> to come down through the line from Edward (John's son) to me. I doubt
> another descendant of Edward's will ever do the Big Y. They will,
> therefore, remain without names.
>
> Don now has one (perhaps two) personal SNPs that would have been
> introduced somewhere in the line from John's son James to himself.
>
> Finally, if anyone is interested, I've created a custom SNP test at
> yseq.net for YP4248. It's $17.50. Once a name is established for our John
> Cooley SNP, I'll create a test for that also. (Remember, we don't know at
> what point the mutation occurred. It could have been John's 3rd
> great-grandfather, for example. Someone who tests positive for it will
> still have an unknown relationship to John. It genetic terms, though, it
> will be pretty darn close.
>
> I always welcome questions.
>
> -Michael
>
>
> - Administrator or Co-Administrator for the following family DNA projects:
> Akins, Ashenhurst, Bishop, Eldridge, Fisk, alt-McDowell, Cooley,
> McDougall, Pickens, Strother - B.A. Humboldt State University, History,
> 2013 - Instructor, the Osher Lifelong Learning Institute (OLLI) at HSU
>
> --
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Received on Tue Aug 25 2015 - 06:55:53 CDT