Question

Can a child have blood group O if his parents have blood group 'A' and 'B'? Explain

Answer 1

parents blood group is A and B
if male parent have blood group of A then it can be written as ±OA and if female parent have blood group of B then it is written as ±OB after meeting of both the parents of this group we get 3 condition for progeny or baby
(±OA) + ( ±OB)=AB ,OB ,OA and also if condition OA and OB occur then the chances of baby's blood group be more of O,A,B

I am not sure this answer is correct but i have read it in a book so please confirm with your teacher or senior before.

Answer 2

1.One parent of A blood group will have genotype either AA or AO
2.Second parent of B blood group may have genotype either BB or BO
3.So one parent may have gametes carrying either A or O
4Second parent may have gametes carrying either B or O
5.So any male gamete containing A or O have equal chance to meet with female gamete containing B or O
6.So child of two parents of one of A blood group and other of B blood group can have all four types of blood groups including O.