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19 Jan 2004

blood types
I would like to know how is it possible, that my brother and two sisters are in the O type bloodgroup and i am the only one in the A type, could it be so even if all of us have the same parents, unfortunatly i do not have my parents blood groups.
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Expert
Geneticist
geneticist

01 Jan 0001

Dear A+

If one of your parents was AO and the other OO, it is entirely possible for you to be AO, and test as A, while your siblings could be OO and test as O.

Regards, Maritha
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