[Link for the survey is here: https://goo.gl/forms/oSpKuAfU4sGnShJ73]
I’ve tested myself out to 67 Y-DNA markers (67-111 are pending!), and I’ve compared that to two 5th cousins. We have some genetic differences, as expected, and I’m always interested in learning more about my Y-DNA. One thing I’d like to do, for example, is compare my results to closer relatives (father and/or son) to look for mutations in father/son pairs.
What is the likelihood of a mutation arising between a father/son pair? What mutations are most likely to arise? Can we use this information to improve estimates to the MRCA?
There are existing studies that examine Y-STR mutation rates (see a great list on the ISOGG wiki: Mutation Rates). Most have dealt with SNP-derived haplogroup ages rather than close relatives, although some have indeed utilized father/son pairs. I’m always on the lookout for more data, however, and as scientists we want this information to be repeated with different father/son pairs. Once we have this data, we can incorporate it into haplogroup age estimates and many other areas of research, hopefully improving the outcomes.