Study the following cross and answer the questions.
[Hint: ABO blood group in man is controlled by three alleles $I^A,I^B$ and i.]
(a) Write the genotypes of the father, mother and son.
(b) The type of dominance of human blood group inheritance is known as

Q. ABO blood groups in humans are controlled by the gene I. It has three alleles-$I^A$, $I^B$ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

Q. Human blood type is determined by codominant alleles. There are three different alleles, known as $I^A$, $I^B$, and i. The $I^A$ and $I^B$ alleles are co-dominant, and the i allele is recessive.
The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous ($I^A{I}^A$ or $I^B{I}^B$, respectively), or heterozygous ($I^{A}i$ or $I^{B}i$, respectively).
A woman with type A blood and a man with type B blood could potentially have offspring with which of the following blood types?

Q.

The gene I that determines ABO blood groups has three alleles $I^A,I^{B}and{I}^O$ . The correct sequence of dominance of these alleles is

Q.

The gene I that determines ABO blood groups has three alleles $I^A,I^{B}and{I}^O$ . The correct sequence of dominance of these alleles is

Q. Three alleles namely $I^A,I^B$ and i control the blood grouping in human beings. How many genotypes are likely to be present in human population ____________.