Question

A man with blood group B marries a woman with blood group A and their first child is having blood group B. What is the genotype of child?

• A. $I^B{I}^O$
• B. $I^B{I}^B$
• C. $I^A{I}^O$
• D. $I^A{I}^B$

Answer 1

The correct option is A $I^B{I}^O$

Blood group of an individual depends upon the presence of antigen present on the surface of RBC, inherited from parents, which are usually glycoprotein, can also be carbohydrate or glycolipids and presence of antibody in serum. The antigen determines the blood group, if an individual has antigen A so his Blood group will be A and antibody will be Anti -B. AB blood group has no antibody and O blood group has no antigen.

Hence answer is option A.