A woman with type A blood bears a child with type O blood. The man she thinks is the father has type B blood. On the basis of ABO blood types, is it possible to prove that he could not be the father?
What will be an ideal response?
The man could be heterozygous for type B which means he carries the gene for
type O. Unless his actual genotype could be determined by laboratory testing, or a blood
type pedigree could be determined for sever generations of his ancestors, it could not be
proven that he is not the father.
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