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O Levels Biology (5090)•5090/12/O/N/23
Question 29 from 5090/12/O/N/23

Explanation

Chromosome Ploidy in Reproduction

Steps:

  • Leaf cells are somatic and diploid (2n = 20 chromosomes).
  • Sexual reproduction involves meiosis, halving chromosomes to produce haploid gametes (n = 10).
  • Asexual reproduction uses mitosis on diploid cells, maintaining 2n = 20 chromosomes.
  • Thus, gametes have 10, asexual cells have 20.

Why C is correct:

  • Gametes are haploid (n=10) per meiosis definition; asexual cells remain diploid (2n=20) via mitosis.

Why the others are wrong:

  • A: Asexual cells are diploid, not haploid.
  • B: Gametes are haploid, not diploid.
  • D: Gametes are haploid, not diploid.

Final answer: C

Topic: Asexual and sexual reproduction

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