Question

question 6 of 10
blood type is a characteristic that has multiple alleles. the a and b alleles are
codominant, and they are both dominant over the o allele. a parent with type
o blood and a parent who is heterozygous for type a blood have a child.
what is the probability that their child will have the aa genotype?
a. 0.50
b. 0.75
c. 0.25
d. 0.00

Explanation:

Step1: Determine the genotypes of the parents

The parent with type O blood has the genotype \(OO\). The heterozygous type A parent has the genotype \(AO\).

Step2: Use Punnett square analysis

The possible gametes from the \(OO\) parent are all \(O\). The possible gametes from the \(AO\) parent are \(A\) and \(O\). When we make a Punnett square:

	\(O\)	\(O\)
\(O\)	\(OO\)	\(OO\)

There is no combination that results in the \(AA\) genotype. So the probability of the child having \(AA\) genotype is \(0\).

Answer:

D. 0.00