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 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 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 AB or B because blood types AB is considered codominant

Answer 1

To find out Kamar's mother's possible blood type based on the information given:

1. Kamar's blood type is AB, which means he has one A allele and one B allele.
2. Kamar's father's blood type is heterozygous A, which means he can either have the genotype AA or AO. This means he can pass on either an A allele or an O allele to his offspring.
3. Since Kamar's father can pass on an A or O allele, and to have blood type AB, Kamar must receive a B allele from his mother.

Given these genetic facts, we can analyze the possible blood types of Kamar's mother:

- For Kamar to have blood type AB, his mother must carry at least one B allele. Therefore, her possible blood types that include a B allele would be either:
- Blood type B (genotype BB or BO)
- Blood type AB (genotype AB)

Kamar's mother **cannot** have blood type O, as that would not provide a B allele for Kamar.

Thus, the correct assumption about Kamar's mother's blood type is:

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