At 18:53 19/04/2017, Tanya wrote: >My participant has been allocated a Haplogroup and has a lot of matches at the 12 marker level, but only 1 at the 25 marker level and none at all at the 37 marker level, which I understand is quite rare. My concern is what this means! I am worried that perhaps this means that the sample wasn�t very good and it has been possible to extract only limited information from it. I had a good match ("genetic distance" of zero) at 12 markers, which disappeared when we expanded the number of markers. Completely normal, and I wouldn't have thought it rare. HTH Andy.