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JAMB Biology 1989 Question 38

Question 38

Mendelian Inheritance

If parents with blood groups AB and OO produce six children

  1. A.three of them will have group B
  2. B.two of them will have group A
  3. C.all the offspring will have group O
  4. D.none of them will have group A
Show the answer and explanation

Answer: A (three of them will have group B)

Explanation

AB × OO gives AO and BO in equal proportion, so on average half of six children, three, will be group B.