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)
Responses

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

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

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

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

Answer 1

Correct choice: Kamar’s mother must be either AB or B because blood types are codominant.

Explanation: Father is IA i (heterozygous A) and Kamar is IA IB. Kamar must have gotten the IA from his father and the IB from his mother, so the mother must carry an IB allele — i.e., be type B (IBIB or IBi) or type AB (IAIB).