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Question: A man with type O positive blood married a woman with type B negative blood. The types of the blood ...

A man with type O positive blood married a woman with type B negative blood. The types of the blood of their children can be
A.B positive
B.O positive
C.B negative and B positive
D. O negative and O positive
E.B negative and positive and O negative and positive.

Explanation

Solution

The blood group depends on the antigen present on the surface of RBC, If there is A antigen then the blood group of the individual will be A, The positive and negative blood group depends on the Rh factor.

Complete answer:
Antigens are a substance that can bring immune response and are present on the RBC and the plasma contains natural antibody which is a protein produced by the immune system on interaction with antigen and the antibody is totally opposite to the antigen present on RBC, For example, A person with blood group B will have antigen B on its surface and anti-A antibody in its plasma.
There are a total of four types of blood Group A, B, AB, and O, where the AB blood group do not have any antibodies in the plasma but have two antigens A and B on the plasma and the individual with O blood group do not have any antigen but have two antibodies anti-A and anti-B in the plasma.
-In the question, the man is with blood group O and the woman is of blood group B, so their children can have both B and O blood groups.
The positive and negative Rh factor of blood does not depend on the blood group of parents because an Rh-negative gene can be masked by the Rh-positive gene, Hence this Rh factor of an individual is independent of the Rh factor of the parents.
Option D: Both B and O blood groups are possible because father has an O blood group and mother has a B blood group and the Rh factor can be either positive or negative.


Hence, the correct answer is option (D)

Note: Person with Blood group O is known as a universal donor as it can donate its blood to any person because they do not have any antigen and person with blood group AB are universal recipient because they can receive blood from any individual as they do not have any antibody.