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Question : A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits-blood group A or 0- is dominant? Why or why not?

Answer»

Solution :No, because EITHER blood GROUP A or O can be DOMINANT.
Possibility I: Blood group A is dominant and blood group O is RECESSIVE
Possibility II : Blood group O is dominant and blood group A is recessive.


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