Question

1. a child has type b blood. what are two possible genotypes of the child? 3. what is the genotype of type o blood?

Explanation:

For question 2, in the ABO blood - type system, the B allele (\(I^{B}\)) is dominant over the O allele (\(i\)). So, a person with type B blood can have two genotypes. If they have two B alleles (\(I^{B}I^{B}\)), they are homozygous for the B allele. If they have one B allele and one O allele (\(I^{B}i\)), they are heterozygous for the B allele.
For question 3, in the ABO blood - type system, the O blood type is recessive. The only way to have type O blood is to have two O alleles (\(ii\)) because the O allele (\(i\)) is recessive to both the A (\(I^{A}\)) and B (\(I^{B}\)) alleles.

Answer:

1. The two possible genotypes of a child with type B blood are \(I^{B}I^{B}\) and \(I^{B}i\).
2. The genotype of type O blood is \(ii\).