List, As we know, David Wilson's observation that there was a bunch of consistent non-modal values in the greater R1b "pool" led to the ultimate discovery of the R-M222 SNP. With hindsight we can now see that there are 2/12, or 5/25, or 7/37 markers that are off-modal to L21, and are very, very consistent throughout the M222 cohort. We further find that there are 10/67, and 14/111 that fall into the same category. In my study of Grierson/Greers, ([1]http://www.shade.id.au/Grierson/GriersonDNA.htm > Excel Chart 1d) I have now identified a cluster that contains 10/111 of consistent off-modal markers with respect to M222. These markers are also mostly off-modal to L21, making a total of (roughly) 22/111 - there are, of course, significant variations within L21 due to its greater age. I am wondering whether this might, in the same way that David observed in R1b, indicate the presence of a junior (or family) SNP within M222. Now, the WTY process is extremely expensive. It is beyond me as a cost. However, I, and another of my distant cousins, have taken the 23andMe genotype test, which in both cases has confirmed the FTDNA YDNA rating of M222+. When comparing our individual genotypes, 23andMe says we have overall 74.5% similar in 557160 SNPs. By all other accounts we are about 600 years apart, or about 20 generations. Obviously, one of those SNPs is M222 (under the rs code, rs20321). I understand there is a way we can compare all SNPs, and therefore I assume that we can identify the common ones. Does anybody know whether we can further isolate those on the Y chromosome within the 23andMe results? If that is possible, identification of those on the Y chromosome would clearly assist in any potential discovery of SNP variations within M222. From my point of view, that would be much the cheaper outcome, as well! David Grierson References 1. http://www.shade.id.au/Grierson/GriersonDNA.htm