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

Answer 1

To determine Kamar's mother's possible blood types, we need to analyze the given information carefully:

1. Kamar's blood type is AB, which means he inherited an A allele from one parent and a B allele from the other parent.
2. Kamar's father has a heterozygous A blood type, which can either be genotype AA or AO.

• If Kamar's father is genotype AA, he can only pass on an A allele.
• If Kamar's father is genotype AO, he can pass on either an A or an O allele.

Given that Kamar's blood type is AB, it means he must have inherited a B allele from his mother. Therefore, Kamar's mother must have a blood type that can provide a B allele.

The possible blood types for Kamar's mother which can provide a B allele are:

• B (genotype BB or BO)
• AB (genotype AB)

Based on the above analysis, the correct response is:

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