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 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 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 A or O because blood type AB is considered incomplete dominant.

Answer 1

To determine Kamar's mother's possible blood types, we need to analyze the blood types of Kamar and his father:

1. Kamar's blood type is AB. This means he has one A allele and one B allele.
2. His father's blood type is heterozygous A, which means he has either two A alleles (AA) or one A and one O allele (AO).

Since Kamar must inherit one allele from each parent, the possible combinations for Kamar's blood type are:

• If the father contributes an A allele (from either AA or AO), the mother must contribute a B allele for Kamar to be AB.
• If the father contributes an A allele, the mother cannot contribute an O allele since Kamar's blood type is AB, not A or O.

Thus, for Kamar to have an AB blood type, his mother must have a B allele. Therefore, Kamar's mother must be either blood type B or AB.

Based on this information, the correct response is:

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