The Doherty modal (that John McLaughlin posted) matches the O'Niall modal except at three STRs. DYS458 Doherty = 18, O'Niall = 17 DYS460 Doherty = 12, O'Niall = 11 YCAII Doherty = 19-22, O'Niall = 19-23 Among the Doherty Surname Group participants in subgroup 1 (those who are M222 and have a Doherty surname - all variants), there are an equal number who have DYS460 = 11 and DYS460 = 12. Therefore the modal for this subgroup swings back and forth as participants are added to this sub group. Currently more M222 Dohertys have DYS460 = 11 than DYS460 = 12. But this may switch when the next M222 Doherty participant joins. While this may be not the same as the "sweet spot" concept where the STR value for an individual family line mutates back to a specific value, it seems this group is behaving this way. Bob Doherty Sent from my iPad