1
Ancestral Family Tree DNA Testing / Re: Ancestry Assignment to Both Sides
« on: Wednesday 24 April 24 09:55 BST (UK) »I have a match with 42cM across 3 segments. She has the same uncommon surname as my mother. She has been correctly identified by Ancestry as having common ancestors with me (our 2 x great grandparents). She is definitely my 3rd cousin on my mother's side. Our trees on Ancestry overlap. Our four shared matches have all been identified correctly by Ancestry as being maternal. But Ancestry designates her as "unassigned". How does the algorithm work that one out?
I have a similar match (DN) where our common ancestor is correctly identified by Anc but sideview technology has not assigned the match to either parent. Interestingly another match (CS) who has the same common ancestor has been correctly assigned. All three of us are on MH and the chromosome browser shows my match with CS as triangulated over three segments but only one with DN. Think that suggests the lack of assignment for DN is because the sideview technology does not consider the match sufficient to assign to a parent with sufficient confidence. It does highlight that sideview technology does not use trees in making the assignment - only DNA is used. I am guessing your situation is similar?