Question

A woman with type A blood marries a man with type AB blood. Which of the following blood types would be impossible for their first child to have?

• A. Type A
• B. Type B
• C. Type 0
• D. Type AB
• E. Any of the blood types are possible.

Answer 1

The correct option is C Type 0

The blood group of the woman is type A. This means her genotype is I^AI^A either or I^Ai.

The blood group of the man is type AB which means his genotype is I^AI^B

The cross can be represented as shown in the figure.

Hence the blood which would be impossible for their first child to have is type O.

So, the correct answer is 'Type O'.