Question

organizing data about expressed traits quick check
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 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 either a or o because blood type ab is considered incomplete dominant.
kamar’s mother must be either ab or b because blood types ab is considered codominant

Explanation:

Step1: Determine Kamar's alleles

Kamar has blood type AB, so his alleles are $I^A I^B$.

Step2: Determine father's alleles

Father is heterozygous A: alleles $I^A i$. He can pass $I^A$ or $i$.

Step3: Identify mother's required allele

Kamar got $I^A$ (from father) and $I^B$ (must come from mother). So mother must have $I^B$.

Step4: Check mother's possible blood types

Blood types with $I^B$: B ($I^B I^B$ or $I^B i$) or AB ($I^A I^B$).

Answer:

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