A woman of blood group A marries a man of blood group AB. What is the blood group of their baby as it indicates that the woman is heterozygous A.
AB
B
O
A
Genotypes AO × AB gives us the following Genotypes AA, OB, AB. Hence, when a woman of blood group A marries a man of blood group AB, B child would indicate that woman is heterozygous A.
Option 2 is the correct answer.