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JAMB Biology 1993 Question 25

Question 25

Reproduction in Animals

Which of the following is TRUE of the process of conjugation in Paramecium?

  1. A.Micronucleus disintegrates
  2. B.Each ex-conjugant divides only once
  3. C.Macronucleus undergoes division
  4. D.Each micronucleus divides twice.
Show the answer and explanation

Answer: D (Each micronucleus divides twice.)

Explanation

During conjugation the macronucleus breaks down while each micronucleus divides twice by meiosis, forming nuclei that are exchanged between the partners.