Question

If a mother and her child belong to group O, what blood group did her father not belong to?

Answer 1

To me, it could be either A or B

My mom is type O, and my dad is type A, I'm O, and the rest of my brothers and sisters are As.

It is easier to me to figure out the blood type of their children if given both parent's blood types.

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read this I might be wrong

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How are ABO alleles inherited by our children?
Each biological parent donates one of their two ABO alleles to their child. A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).

Answer 2

ok the father cannot be AB
he MAY BE be A ,B,O

Answer 3

^^

Answer 4

The father cannot be AB, but he can be A, B, or O