Question

Kamar wants to know his mother's blood type. Kamar knows that his blood type is AB and his father's blood type is heterozygous A. What can Kamar assume about his mother's blood type? (1 point)

Kamar's mother must be either AB or B because blood types AB is considered codominant

O Kamar's mother must be either A or O because blood type AB is considered incomplete dominant.

O Kamar's mother must be O because the recessive allele allows for Kamar to get type A from his father

O Kamar's mother must be AB because blood type AB is inherited from one parent

Answer 1

Correct answer: Kamar's mother must be either AB or B.

Reason: The ABO alleles IA and IB are codominant and i is recessive. Kamar is IA IB, so he must have inherited IB from his mother. Therefore his mother must carry an IB allele (genotype IBIB or IBi → phenotype B, or IAIB → phenotype AB).