Question

problem #3
a sample of blood found at a crime scene was found to be type o. they do not know the main suspects blood type but they do know the suspects parents have homozygous a and o genotypes. are they on the right track with their current suspect? explain in a punnett square.

Explanation:

Step1: Define alleles

Let \(I^A\) represent the allele for blood - type A and \(i\) represent the allele for blood - type O. The parents' genotypes are \(I^A I^A\) and \(ii\).

Step2: Set up Punnett - square

One parent with genotype \(I^A I^A\) can only contribute \(I^A\) alleles, and the other parent with genotype \(ii\) can only contribute \(i\) alleles.

	\(I^A\)	\(I^A\)
\(i\)	\(I^A i\)	\(I^A i\)

Step3: Analyze genotypes

All of the offspring will have the genotype \(I^A i\), which corresponds to blood - type A. Since the blood sample at the crime scene is type O (genotype \(ii\)), they are not on the right track with their current suspect.

Answer:

No, they are not on the right track with their current suspect because the offspring of parents with genotypes \(I^A I^A\) and \(ii\) will all have blood - type A (\(I^A i\)) and not blood - type O (\(ii\)).