Parents with blood types A and B cannot have a child with Type O blood due to genetic inheritance.
Person with Type O blood cannot be a legitimate child of parents with blood Type A and B. The reason is that the genotype for Type O blood is ii, which means both alleles are O. Therefore, to have a child with Type O blood, both parents must pass down an O allele. Since parents with A and B blood types do not carry the O allele, they cannot have a child with Type O blood.
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