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A member asked:

Can you tell me how is it possible that i am an ab+ blood type and my sister is an o type?

A doctor has provided 1 answer

Mendel's laws: Probably one of your parents had one dose of A and one dose of O, and the other had one dose of B and one dose of O.

Dr Colegrove agreed

Answered 7/25/2014

3.9k views

Thank

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