Why my parents’ blood group is B positive and mine is AB positive. How is this possible?

Please explain..

This page is a permanent link to the reply below and its nested replies. See all post replies »

deadgerbil · 22-25

Definitely possible that your mom cheated

My one grandmother cheated. My other grandmother and mom floated that possibility, and it was confirmed with an ancestry DNA test, bc I have no business having African in me otherwise