General Discussion
In reply to the discussion: This message was self-deleted by its author [View all]PoindexterOglethorpe
(25,839 posts)It might be that your mother is 12 percent British. Or more. You don't get exactly half of what each parent has necessarily.
Which is why siblings, even though they really do have the same mother and father, can come out with at least a slightly different mix. As I recall, of my two sisters one showed over 97% British and Irish, and the other was about 95%. The second one had more Scandinavian.
In a family with a more diverse ancestry than ours, the differences between siblings can be much greater. On average siblings share 50% of their DNA. That means the other 50% can be quite different, again especially with a more diverse family background.
I once knew two brothers, same mother and father, but one was clearly (by the way we look at things) African American, and the other clearly Caucasian. Their parents were, as I recall, both bi-racial, the the toss of the genetic dice came out quite differently for them.