HEREDITY
INCOMPLETE DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AB
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Ai
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ii
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All of these are possible
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Detailed explanation-1: -Someone with blood type AB must have both the A and B alleles. The genotype must be AB. Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
Detailed explanation-2: -If a man with type AB blood marries a woman with type O, the children will have blood types A and B. Each blood type will be a fraction of ½. This is because ‘A’ and ‘B’ alleles are dominant alleles on ‘O’.
Detailed explanation-3: -If one of the children is type O, then the mother must have been IAi, because otherwise the child could only be type A. So, the father is ABO genotype ii, Rh type +/-, and the mother is ABO genotype IAi and Rh type +/-.
Detailed explanation-4: -In most cases, an O parent and an AB parent will have only A or B kids.