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Ancestral Family Tree DNA Testing / Does having the same 4 x great grandparents 3 times effect my DNA matches?
« on: Sunday 10 February 19 00:32 GMT (UK) »
So my 4 x great grandparents - James and Ann - had 3 kids whose families intermarried and eventually produced me (and no, I don't have two heads).
Simply put:-
James and Ann had Tom, Mary and Kitty
Tom's daughter Mary Ann married Kitty's son Edward (1st cousins)
Mary's grandson Alan married Mary Ann and Edward's daughter Catherine (2nd cousins?)
Alan and Catherine's son is my grandfather.
Would this inbreeding show up as more inherited DNA from James and Ann than if they were just my 4 x great grandparents only one time? If so does it mean cousin matches to descendents of James and Ann's other children may be more distant than predicted?
Thanks,
Marlene
Simply put:-
James and Ann had Tom, Mary and Kitty
Tom's daughter Mary Ann married Kitty's son Edward (1st cousins)
Mary's grandson Alan married Mary Ann and Edward's daughter Catherine (2nd cousins?)
Alan and Catherine's son is my grandfather.
Would this inbreeding show up as more inherited DNA from James and Ann than if they were just my 4 x great grandparents only one time? If so does it mean cousin matches to descendents of James and Ann's other children may be more distant than predicted?
Thanks,
Marlene
