Question

Please select the statements that characterize the inheritance of the ABO blood groups.

• ABO blood groups are determined by the inheritance of a blood group allele from each parent.

• ABO blood groups are determined by 4 different alleles.

• Inheritance of ABO blood groups illustrate both dominance and codominance.

• ABO blood group inheritance is sex-linked.

• The alleles that determine the ABO blood groups encode the anti-A or anti-B antibodies.

Answer 1

The ABO classification of blood group is a system, where it is determined by the presence or absence of A andB antigens on the RBC.

Here the right options are

• ABO blood groups are determined by the inheritance of a blood group allele from each parent. Where both parents can contribute to the child.
• The alleles that determine the ABO blood groups encode the anti-A or anti-B antibodies.
• ABO blood group inheritance is sex-linked.

ABO blood groups are determined by 3 differnt alleles. They are A, B, and O. Hence the second option can excuded here. ABO blood group is inherited autosomal codominant. Codominance of allele are seen in ABO blood group. But Dominance allele are absent. Hence third option can be excluded. There are four principal types of ABO blood group. they includes A, B, AB, and O. There are two antigens and two antibodies responsible for the ABO type blood group. Hence the last option is correct. ABO blood group inheritance is sex-linked, Because the genes carried out by X chromosomes are called sex linked.