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

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Chapter 8 NCERT Class 10 Science SOLUTIONS

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

Question:

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

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Answer:

The given information is not sufficient to tell which blood group is dominant B or O. For a daughter to have blood group O her mother should be homozygous

OO and father should be heterozygous AO.

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