Question

A man with blood group b marries a woman with blood group o and their daughter has blood group o. Is this information sufficient to tell you which of the traits, i.E., blood group b or o is dominant? Why or why not?

Answer 1

blood group B is dominant over O because B suppresses O and O gets repressed

Answer 2

The give information is not enough to tell us which of the traits – blood group A or O – is dominant. In blood heredity, blood Type A is always dominant and blood Type O is always recessive. Here, father's Blood group can be AA (homozygous) or AO (heterozygous) genotypically, where as that of mother can be OA or OO.

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