question_answer

A man of blood group-A marries a woman of blood group-AB, which type of progeny would  indicate that man is heterozygous?

A) O                                            

B) B

C) A                            

D)        AB

Correct Answer: B

Solution :

                                In this case, progeny with blood group-B is produced only when man is heterozygous, .i.e., IAIO.