Question

the mother is heterozygous blood type a and the father is blood type ab. what are the possible phenotypes?

Explanation:

Step1: Define parental genotypes

Mother: $I^A i$ (heterozygous A); Father: $I^A I^B$ (AB blood type)

Step2: List all gamete combinations

Mother's gametes: $I^A$, $i$; Father's gametes: $I^A$, $I^B$

Step3: Calculate offspring genotypes

Offspring genotypes: $I^A I^A$, $I^A I^B$, $I^A i$, $I^B i$

Step4: Match genotypes to phenotypes

$I^A I^A$/$I^A i$ = Type A; $I^A I^B$ = Type AB; $I^B i$ = Type B

Answer:

The possible blood type phenotypes are Type A, Type B, and Type AB.