Question

Parents of blood group i and AB cannot have a child of blood group AB because ______.

Options

• Gene i^o is dominant over the gene I^A.

• Gene i^o is dominant over the gene I^B.

• Gene I^A and I^B are abunt in one of the parents.

• Gene I^A and I^B are abunt in both the parents.

Answer 1

Parents of blood group i and AB cannot have a child of blood group AB because Gene I^A and I^B are abunt in one of the parents.

Explanation:

Individuals who are heterozygous I^A or I^B have blood group AB. They produce both the antigen (result of the I^A alleles) and the B antigen (product of the I^B alleles). So, because genes A and B are abundant in one of the parents, parents with blood groups O and AB cannot have a child with blood group AB.