Blood Groups - References

My mother blood group B and my father is A then my blood group is O HOW IS POSSIBLE?

It seems "A" can be genetically AO, and "B" can be BO, such that the offspring, which gets one letter from each parent, can be OO.

My father -o grp my mother _b grp am I possible ab group have check various many possible ans please verify thks

My Mom and Dad are A blood group. But I am A-ve! Is it possible ?

Hi im a 32 year old black make and I have type A2 blood type can someone explain to me about that blood type..

I wish to know the procedure or the process of testng the Blood Group