Question

name:
background: the allele for blood type a is represented by the designation i^a and the allele for blood type b is designated as i^b. both of these alleles are dominant to blood type o, which is designated i. they are codominant to each other.

• what are the two possible genotypes for blood type a?
• what are the two possible genotypes for blood type b?
• what is the only possible genotype for blood type ab?
• what is the only possible genotype for blood type o?

work the following problems:
punnett square with i^a, i^a on top and i^a, i on side
how many type a individuals
how many type ab individuals
how many type b individuals
carriers of o type
what are the blood types of the above parents? &
punnett square with i^a, i on top and i^b, i on side
how many type a individuals
how many type ab individuals
how many type b individuals
carriers of o type
what are the blood types of the above parents? &
(note: some answers are filled in the original, but ocr retains the question - related text)

Explanation:

• Blood type A: Since \(I^{A}\) is dominant over \(i\), the genotypes \(I^{A}I^{A}\) (homozygous) and \(I^{A}i\) (heterozygous) will express blood type A.
• Blood type B: Similarly, \(I^{B}\) is dominant over \(i\), so the genotypes \(I^{B}I^{B}\) (homozygous) and \(I^{B}i\) (heterozygous) will express blood type B.
• Blood type AB: Because \(I^{A}\) and \(I^{B}\) are codominant, the only genotype that results in blood type AB is \(I^{A}I^{B}\).
• Blood type O: Since \(i\) is recessive, the only genotype for blood type O is \(ii\).

Answer:

• Two possible genotypes for blood type A: \(I^{A}I^{A}\), \(I^{A}i\)
• Two possible genotypes for blood type B: \(I^{B}I^{B}\), \(I^{B}i\)
• Only possible genotype for blood type AB: \(I^{A}I^{B}\)
• Only possible genotype for blood type O: \(ii\)