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Eburgess
12-24-2015, 05:47 PM
As I was browsing the R1B SNP tree at FTDNA, I saw CTS10893 deep n the U106 tree under FGC7559 but also deep in P312 under CTS4299?

Is this a mistake or is there something fundamental about the placement of SNPs or their nomenclature I don't understand yet? This SNP is of personal interest as I have tested negative for it, but positive for FGC7559.

P312>DF27>Z195>L176>Z198>SRY2627>Z202>Z205>Z207>CTS4299>CTS10893

U106>Z381>Z301>L48>Z9>Z30>Z2>Z31>FGC7559>CTS10893

Huntergatherer1066
12-24-2015, 06:40 PM
CTS10893 is a recurrent SNP, occurring independently in both places. The U106 variety is older and more common.

Eburgess
12-24-2015, 10:32 PM
Huntergatherer Thank you!

So this is precisely the same mutation at the same spot on the Y-Chromosome that happened independently in 2 lines of descent. This means that testing single SNPs can be misleading and should be avoided, a SNP is always best compared with other SNPs for context.