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View Full Version : J-M67 vs J-M172 in one family: real difference or due to FTDNA procedures?



Doric
12-03-2017, 11:46 AM
Could FTDNA be changing how they test J2 over time? I have sent in DNA for 8 members of my extended family over the years 2010 to 2017, and all ordered the same Y-DNA test. The first two men, tested in 2010 and 2012 were identified by FTDNA as J-M67 and the others, tested 2014 to 2017, as J-M172. The two earliest tested (the J-M67 ones) were actually the farthest apart on the family tree, from different sons in 1600s. Could you tell me if this is just a classification change, or a real difference? If FTDNA is no longer doing the M67 subclade, how can I determine if those identified as M172 are also M67, like their relatives?

Messier 67
04-18-2018, 02:57 PM
Could FTDNA be changing how they test J2 over time? I have sent in DNA for 8 members of my extended family over the years 2010 to 2017, and all ordered the same Y-DNA test. The first two men, tested in 2010 and 2012 were identified by FTDNA as “J-M67” and the others, tested 2014 to 2017, as “J-M172”. The two earliest tested (the J-M67 ones) were actually the farthest apart on the family tree, from different sons in 1600s. Could you tell me if this is just a classification change, or a real difference? If FTDNA is no longer doing the M67 subclade, how can I determine if those identified as M172 are also M67, like their relatives?

You are probably aware how father's pass their Y-DNA to their sons. Of those testing positive for M67, all male descendants from sons, not daughters would be M67. If one brother tests positive for M67, the other blood brother from the same father would be M67.

I am not sure about FTDNA testing, someone else could help you on that.

Anabasis
04-18-2018, 04:52 PM
All M67 are also M172... M172 upstream of M67...
https://yfull.com/tree/J2/
https://yfull.com/tree/J-M67/

M172 mutation formed in a J man 31600 ago and formed first J2 man.

One of his grandsons 13000 years ago before present had a m67 mutation

When FTDNA test your relatives sometimes they named them as M67, but sometimes they only show M172. It depend on which mutation databes they used during testing procedure. Most probably all are M67. There nothing wrong with testing.