Which statement describes the blood type of a person with the alleles IAIB?

Question

It is type AB because A and B exhibit incomplete dominance.
It is type AB because A and B are codominant.
It is type O because A and B are codominant.
It is type A because A and B exhibit incomplete dominance.

Answer 1

The correct statement is: It is type AB because A and B are codominant.

In blood type inheritance, the IA and IB alleles are both expressed when present together, resulting in the AB blood type. This is a classic example of codominance.