Post by Robin on Apr 27, 2014 16:24:38 GMT
My family have long suspected that my paternal grandfather (and his only sibling, a sister) was not the biological child of his believed father. My dad is considering doing a Y-DNA test to determine whether this was a non-paternity event or not. I have taken an autosomal DNA test but have made no discoveries in this regard. I know that a Y-DNA test is not the same as a paternity test but my understanding is that through DNA matches with other people, we will be able to determine if there was a non-paternity event at some point by comparing surnames/trees with the other people whose Y-DNA match?
Is this correct? And if so, which Y-DNA test should I have my dad take? FTDNA offer Y-DNA tests with 37 markers, 67 markers, and 111 markers. Since the non-paternity event we're looking for was within a few generations, could we get away with 37 markers? The trouble is, my great grandfather (the one who I suspect is not the biological father of my grandfather) did not have any brothers so we'd actually be looking for male descendants of my 3rd great grandfather (my dad's 2nd great grandfather) or even further back. How many markers should we test?
Is this correct? And if so, which Y-DNA test should I have my dad take? FTDNA offer Y-DNA tests with 37 markers, 67 markers, and 111 markers. Since the non-paternity event we're looking for was within a few generations, could we get away with 37 markers? The trouble is, my great grandfather (the one who I suspect is not the biological father of my grandfather) did not have any brothers so we'd actually be looking for male descendants of my 3rd great grandfather (my dad's 2nd great grandfather) or even further back. How many markers should we test?