A man with blood group A marries a women with blood group O and their daughter has blood group O. Is this information enough to tell you which of the trait - blood group Air O- is dominant? why or why not?
Answers
Answer:
The information is not enough to decide which blood group is dominant.
But universally , blood group A is dominant whereas blood group O is recessive.
case 1: For an A group father it may be homozygous (AA) or heterozygous(A0) as pairs.So as A is dominant and an O group mother, the O group is recessive, then the daughter may have either group O Or A.
If A from father crosses with O of mother then blood group of daughter =A(dominant)
case 2:But if O from father crosses with O of mother then blood group of Daughter=) (as recessive) blood group expressed in homozygous condition.
Answer:
A is dominant over O
but according to this question O is transferred may be O is as an recessive trait in man which combined with the woman to make a blood group of O
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