Question

A woman heterozygous for B blood group married a man of AB blood group. Their probability of having child of B blood group is

• A. 25%
• B. 50%
• C. 75%
• D. 100%

Answer 1

The correct option is B 50%

As evident from the above cross, the offspring may have blood group $AB\left(I^A{I}^B\right),A\left(I^{A}i\right)$ and $B\left(I^B{I}^{B}andIBi\right)$. So, the probability of having a child of the B blood group is 50%.