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)

Question

Responses

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

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 O because the recessive allele allows for Kamar to get type A from his father

Answer 1

To determine Kamar's mother's possible blood types given Kamar's blood type (AB) and his father's blood type (heterozygous A), we need to analyze the inheritance of blood types.

1. Kamar's father has a heterozygous A blood type, which means he has the genotype IAi, where IA represents the A allele and i represents the O allele.
2. Kamar's blood type is AB, which means he has the genotype IAIB.

For Kamar to have the AB blood type, he must have inherited one A allele from his father and one B allele from his mother. Therefore, Kamar's mother must provide the B allele.

Given that blood type B can have two possible genotypes (IBIB or IBi), Kamar's mother could be either:

• Blood type B (IBi)
• Blood type AB (IAIB)

Therefore, Kamar's mother cannot be blood type A or O, as those would not provide the necessary B allele for Kamar to have an AB blood type.

From these options, the best answer is:

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