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WAEC Biology 2001 Question 56

Question 56

Variation

Use the following human characteristics to answer this question.
I. Complexion II. Height III. Blood Rh factor IV. Colour blindness
Which of the above human characteristics are discontinuous variations?

  1. A.I and III only
  2. B.II and III only
  3. C.II and IV only
  4. D.III and IV only
Show the answer and explanation

Answer: D (III and IV only)

Explanation

Rh factor and colour blindness fall into clear-cut groups (you either have it or not); complexion and height vary continuously.