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JAMB Biology 2003 Question 45

Question 45

Evolution

An argument against Lamarck's theory of evolution is that

  1. A.disuse of body part cannot weaken the part
  2. B.disused part is dropped off in the offspring
  3. C.acquired traits cannot be passed on to the offspring.
  4. D.traits cannot be acquired through constant use of body parts.
Show the answer and explanation

Answer: C (acquired traits cannot be passed on to the offspring.)

Explanation

Lamarck said features gained during life are inherited. But changes to body cells, such as big muscles, do not change the genes in the gametes, so they are not passed on.