THE HUMAN IMMUNE SYSTEM
BLOOD GROUPS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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IBIB
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ii
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IAIB
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IAi
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Detailed explanation-1: -Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
Detailed explanation-2: -Parents with type B will have genotype either BB or Bi, therefore, there is a possibility for a child to have genotype “ii". The type O is determined by allele “i” so the parent with type “O” can have a child with genotype “ii".
Detailed explanation-3: -For example, two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type.
Detailed explanation-4: -The IA allele gives type A, IB gives type B, and i gives type O. As both IA and IB are dominant over i, only ii people have type O blood.
Detailed explanation-5: -Could an individual with blood type O (genotype ii) be a legitimate child of parents in which one parent had blood type A and the other parent had blood type B? Yes this child could have come from these parents.