Question

Name the gene controlling the blood group systems in humans.

Answer 1

Blood group system:

• The blood group system is the way of classifying human blood on the basis of the absence or presence of antigens A and B on the red blood cell's surface.
• In the ABO blood group system, blood groups are of four types. They are AB, B, A, and O.

Name of the genes that control the human blood group systems:

• Gene I is the name of the gene controlling the blood group system in human beings.
• This gene possesses three different forms or alleles, I^A, I^B, and I^O.
• Three different alleles are not present together in an individual, and only two alleles are present in one individual.
• I^O is a recessive allele, and the other two alleles are dominant.
• The phenomenon of inheritance of the blood group system is called codominance.