Question

What can be the blood group of offspring when both parents have an AB blood group?

• A. AB only
• B. A, B and AB
• C. A, B, AB and O
• D. A and B only

Answer 1

The correct option is B A, B and AB

When both parents have blood group $AB\left(I^A{I}^B\right)$ then offsprings can have blood groups $A\left(I^A{I}^A\right)$, $B\left(I^B{I}^B\right)$, or $AB\left(I^A{I}^B\right)$ but not O as allele i is not present in any of the parent.