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WAEC Biology 1992 Question 52

Question 52

Variation

Blood groups and tongue-rolling are examples of

  1. A.continuous variation
  2. B.discontinuous variation
  3. C.variation due to environment
  4. D.adaptive variation
  5. E.sex-linked characters
Show the answer and explanation

Answer: B (discontinuous variation)

Explanation

You either have a blood group or you don't, and can or cannot roll your tongue: clear-cut groups, so discontinuous variation.