Blood type in humans exhibits codominance in the ABO (IA, 1B, and i alleles) system. A woman has blood type A, and her husband has blood type B. Given this information, which could not be the blood type of her child? O A O All of these could be her child's blood type O B O AB
ABO classification is based on the antigens Antigen A and Antigen B. Based on the presence or lack of antigens on the surface of red blood cells and plasma antibodies, the ABO grouping system is divided into four categories.
Antigen A and antibody B are found in Group A.
Antigen B and antibody A are found in Group B.
A and B antigens are present in Group AB, but no antibodies are present (neither A nor B).
Antigens A and B are not present in Group O, however both antibodies A and B are present.
Mismatching of blood groups can cause clumping of red blood cells, which can lead to various disorders. The ABO group system is important during blood donation or blood transfusion. While transfusing, it is critical that the blood cells match, i.e.Compatibility between the donor and the recipient is essential. Because there are no antibodies for A and O in blood group A, a person of blood group A can receive blood from either group A or O.
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