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JAMB Biology 2000 Question 43

Question 43

Mendelian Inheritance

Blood grouping in human beings is derived from combinations of

  1. A.two different alleles
  2. B.four different alleles
  3. C.three different alleles
  4. D.two different genes.
Show the answer and explanation

Answer: C (three different alleles)

Explanation

The ABO groups are controlled by one gene with three alleles (A, B and O); pairs of these give groups A, B, AB and O.