Question

If the blood group of the mother is ‘AB’ and the father is ‘O’, the child may be
A. A, AB or O
B. AB or O
C. B or O
D. A or B

Answer 1

Blood is an important body fluid which helps to transport the nutrients and oxygen to support the various metabolic processes. It also helps to remove the waste product of the cells. The blood in humans is grouped into various types that are inherited from the parents.

Complete step by step answer: Blood is a connective tissue that is fluid-like in nature therefore It is also said that blood is body fluid. It is present mostly in humans and other animals. Blood circulated throughout the whole body by the blood vessels. It is associated with the transportation and delivery of necessary substances such as nutrients, enzymes and hormones as well as oxygen to the cells and transports metabolic waste products away from those same cells for elimination from the body.
There are various systems introduced for the classification of blood groups. ABO system is one of the most important systems for the classification of blood groups. According to the presence of antigens and antibodies it is classified into the four groups that are A, B, O, and AB. This is known as ABO system of blood group.
In the ABO blood group system, the classification of human blood is done based on the inherited properties of red blood cells or erythrocytes. The blood groups are determined by the presence or absence of the antigens A and B, which are carried on the surface of the red cells. There are generally four types of blood groups found in human beings on the basis of this system and these are A, B, AB, and O. This system of classification A, B, and O blood groups were first identified by Karl Landsteiner.
There are two genes present for ABO type and A and B is the code of complex sugars present in the blood cells. The body produces antibodies against the sugars which are not present in the blood that means if the blood bears the A sugar then the antibodies will be anti-B and if the sugar is B then the antibodies will be anti-A. The O gene does not have any antigen so there are both anti-A and anti-B antibodies present.
With two genes, the genotype of blood AA or AO will generate Group A, and BB or BO will generate Group B. Again, genotype AB will generate Group AB, and OO will generate Group O.
If the blood group of the mother is AB then the genes are A and B, while the blood group of the father is O then he bears two O genes. The child will receive an O from the father and either A or B from the mother, so the child must have either AO or BO which means either blood group A or group B.
Therefore, the correct is D.

Note: Blood is an important material for the human being which is circulated through the blood vessels. The blood can be classified into four groups. These are A, B, AB, and O. This classification is done based on the presence of antigens and antibodies. When the blood group of a mother is AB, the genes are A and B and the genes of the father are both O as his blood group is O. So, the blood group of the child will be either A or B.