For a person with blood group ‘O’, which of the following is not a possible combination of parents' blood group genotypes ?

Question

Quantrex Academy · Accepted Answer

Correct answer: A. Father : I^A I^B and Mother : I^A i

Blood group 'O' corresponds to the homozygous recessive genotype

ii

.

For a child to have blood group 'O', they must inherit one

i

allele from each parent. This means both parents must possess at least one

i

allele in their genotype.

In the combination Father :

I^A I^B

and Mother :

I^A i

, the father does not have an

i

allele. Therefore, he can only pass either an

I^A

or an

I^B

allele to the offspring.

As a result, it is impossible for this couple to produce a child with the

ii

genotype (blood group 'O').

In all other given combinations, both parents are heterozygous and possess an

i

allele, making it possible for them to have a child with blood group 'O'.

Answer: Father :

I^A I^B

and Mother :

I^A i

For a person with blood group ‘O’, which of the following is not a...