Question

Marriage between persons having AB blood groups would produce
A)Offsprings with AB blood group only
B)Offsprings with A, B and AB blood groups
C)Offsprings with A and B blood groups only
D)Offsprings with A, B , AB and O blood groups

Answer 1

The human blood grouping in the ABO blood group system is based on the presence or absence of antigens A and B on the red cell surface. There may be type A, type B, type O or type AB blood in a person.

Complete answer:
For the ABO blood grouping system in humans there are four types of principal groups: A, B, AB, and O. For the ABO groups, there are two antigens and two antibodies that are mainly responsible. The particular combination of these four components decides the blood type of an individual.

https://www.ncbi.nlm.nih.gov/books/NBK2267/

Marriage between people having AB blood groups means the parents of the child have the same blood group i.e AB. This means that both will produce both A and B antigens.

Let us analyze the options to find out the correct option.
Option A: Since AB blood group person has both A and B antigens, therefore, this is an incorrect option.

Option B: They will produce offspring with A, B and AB blood groups. Therefore, this is the correct option.

Option C and D: These are incorrect options.

Hence, the correct answer is option (B)

Note: 1.Karl Landsteiner first studied the ABO blood grouping system.
2.A person with AB+ blood group is a universal recipient.
3.AB- is the most rare blood group.