A member asked:

Hey. how is it possible for my mum to have an ab blood type and i came out with an o. father is not ab. thx?

A doctor has provided 1 answer

It happens: There are lots of families everywhere in which the blood types of the children are different than the blood types of the parents. That's how life is, and is how it has been for thousands of years. We don't worry about that unless we are looking for some bad genetic disease and want to trace its exact inheritance among offspring through several generations.

Answered 5/14/2020

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Thank

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