Question

What would be the possible blood group of the offsprings born to parents with blood groups A and O?

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

Answer 1

The correct option is A $A$ and $O$

Parent with blood group A will either have I${}^A$I${}^A$ or I${}^A$i. The parent with blood group O will have ii. So, the possible blood groups their offsprings can show will be either A or O, as I${}^A$ is dominant over i, so it will make A blood group. Whenever i will be present in the homozygous condition it will result in blood group O.

Hence, the correct answer is 'A and O'