Why do I not share the same Genetic Communities with my known relatives?
Q I’ve included the ethnicity and Genetic Communities from Ancestry’s ‘DNA Compare’ tool so that you can see what I’d expected to find on the DNA communities comparison. The first three matches are related to me via a set of Irish great grandparents as they are descended from siblings of my paternal grandfather and the last two are much closer matches who are related to me via my paternal grandfather.
We all share a reasonable percentage of Irish ethnicity but none of them share any of the same Irish Genetic Communities with me. Why would that be the case when we all descend from the same Irish ancestors?
Judith Irwin
A I suspect your situation is a consequence of the vagaries of autosomal DNA inheritance combined with the way the algorithms behind ‘Genetic Communities’ work.
All of the people you are comparing against have Irish ethnicity percentage-wise (some quite high) so it’s likely they
