If the blood group of both the parents is AB, then the possible blood group of their children will be:

Question

Question

This question was previously asked in

BSSC Inter Level Pre PYP (29th Jan 2017)

Answer 1

The correct answer is A, B, and AB.

Key Points

From the punnet square, we can see that,
The Blood group can be A, AB, and B.
The blood group shows codominance interaction.
A and B are codominant over the O blood group.
IAIA = A blood group as here only A allele is present on the I gene.
IAIB= AB blood group as here A and B allele is present on the I gene.
IBIB=B blood group as here B allele is present on the I gene.
If the blood group of both parents is AB, then the possible blood group of their children will be A, B, and AB.

Additional Information

Blood Group	Antigens on RBC	Antibody in plasma	Donor Blood Group
A	A	anti-B	A, O
B	B	anti-A	B, O
AB	A , B	No ab	AB, A, B, O
O	No ag	anti-A, B	O