Question

If your father has blood type O, and mother has blood type AB, which of the following blood types are you likely to have?

• A. A
• B. B
• C. Either A or B
• D. O

Answer 1

The correct option is C

Either A or B

If the father’s blood group is O, he has the genotype $I^O{I}^O$ or (ii) . The mother has blood type AB, which means that her genotype would be $I^A{I}^B$. The possible combinations of these two groups would result in children having genotypes $I^A{I}^{O}or{I}^B{I}^O$, which would give them blood groups A or B respectively. Thus, blood group O cannot appear among children if one of the parents has the group AB.