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)
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 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

Answer 1

Kamar's mother must be either B or AB.

Reason: Father (AO) can give an A allele, and Kamar is AB, so he must have received a B allele from his mother. Thus she must carry a B allele (phenotype B or AB).