Question

with regard to abo blood types in humans, determine the genotype of the male and female parent shown below. male parent: blood type a whose mother was type o female parent: blood type a whose father was type o part a what is the genotype of the male parent? options: ( i^a i^b ), ( i^a i^a ), ( ii ), ( i^a i )

Explanation:

Step1: Recall ABO blood type genetics

Blood type O has genotype \( ii \). A person with blood type A can have genotype \( I^A I^A \) or \( I^A i \). The male parent's mother is type O (genotype \( ii \)), so she must pass an \( i \) allele to the male.

Step2: Determine male's genotype

Since the male is blood type A, and he received an \( i \) from his mother, his genotype must be \( I^A i \) (because to be type A, he has an \( I^A \) allele, and the other allele is \( i \) from his mother).

Answer:

\( I^A i \) (corresponding to the option \( I^A i \))