Answer:
AB : BO
2 : 2
Explanation:
A O
B AB BO
B AB BO
Because only two alleles can be found in an individual, there are six possible combinations i.e. AA, AO, BB, BO, AB and OO. If a man is heterozygous for blood group A marries woman who is homozygous for blood group B then 2 children will be blood group AB and 2 will have BO.
