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Old 16th June 2018, 04:45 AM
GG99 GG99 is offline
FTDNA Customer
Join Date: Oct 2017
Posts: 11
Originally Posted by MoberlyDrake View Post
It can change at any generation. If you could test your father, grandfather, great-grandfather, you might find it has changed between one of those generations. You can also have back-mutations where it mutates back to a previous value.

The Y-DNA of many Hampton men descended from a certain immigrant tend to be the same, but my cousin has a mutation in one marker and his 3rd cousin has a mutation in a different marker. Both mutations apparently occurred at some point between them and my 3rd great-grandfather.

It's random. Average numbers of generations between mutations in various markers have been computed, but they are only averages. I believe I read of a case where a father and son differed on 3 markers.

Thanks for answering.

I know DNA can be “flaky and skittish”, but I was hoping DYS439 was one of the more “laid back” versions … more like YCAII and DYS454

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