What are the products of the $I^A$ and $I^B$ alleles?

The blood group of Rameshbhai is $B$ and his daughter's blood group is $AB$. What will be the blood group of his wife?

The offspring produced from a marriage have only $O$ or $A$ blood groups. Of the genotypes given below,the possible genotypes of the parents would be

If a man with blood group $A$ marries a woman with blood group $AB$, and their first child has blood group $B$, what is the genotype of the child?

Sometimes,there are more than two alleles for a given chromosome locus. In this case,a trait is said to be governed by:

How many phenotypes and genotypes are possible in $ABO$ blood group systems?