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WAEC Biology 2015 Question 42

Question 42

Mendelian Inheritance

A woman with blood group A gives birth to a child with blood group O. Which of the following blood groups cannot belong to the father?

  1. A.A
  2. B.B
  3. C.AB
  4. D.O.
Show the answer and explanation

Answer: C (AB)

Explanation

A group O child (OO) must get an O allele from each parent. A father with group AB has no O allele, so he cannot be the father.