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Sagot :
In this question, the mother has O blood type, and the father has A blood type and is homozygous.
This means that they have the following genotypes:
• Mother: ii
,• Father: IᵃIᵃ
The mother has two alleles of allele i, so it doesn't have antigens A or B on the surface of her red blood cells, and the father has two alleles of the allele IᵃIᵃ, so his red blood cells have the antigen A.
Each of them has only one type of allele, so the mother will always pass down the i allele and the father the Iᵃ allele, so all of their children will have a genotype of Iᵃi, with one copy of each allele.
This means that the child will have the antigen A on the surface of their red blood cells, so it will have blood type A (the option I).
This means the right answer is C. I only.
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