Question Detail
Question
How many types of alleles control traits in ABO blood group? a. 1 b. 3 c. 2 d. 4
Correct Answer
Option B is the correct answer.
Detailed Explanation
The ABO blood group system is controlled by a single gene with three common alleles: I^A, I^B, and i. I^A and I^B are codominant, and both are dominant over i.
Hint
Three alleles exist in the population, but each individual carries two.