Two individuals decide to have children. the expected blood group genotypes are 50% of blood type a, and 25% each of blood types ab and b. what genotypes are the parents?
a. ia i x ii
b. ib i x ia ib
c. ia i x ia ib
d. ia i x ib i

C. IA i x IA IB

Explanation:

If one individual is with genotype IA i it means that it has A blood type. This is because IA allele is dominant over i allele. Another individual with genotype IAIB has th AB blood type because allele IA is codominant to allele IB (both alleles are expressed when are together in heterozygous).

P: IAi x  IAIB

F1: IAIA  IAIB  IAi  IBi

IAIA and IAi are genotypes that will give A blood (1/2)

IAIB- AB blood type (1.4)

IBi- B blood type (1/4)

is this a psat question, if so do not cheat try your best.