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IB Biology SL D2.1.9 Meiosis As Reduction Division Questions

Meiosis begins after one round of DNA replication and includes two nuclear divisions. In meiosis I, homologous chromosomes separate to halve the chromosome number and produce haploid nuclei.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how meiosis halves chromosome number: homologous chromosomes separate in meiosis I, then sister chromatids separate in meiosis II.
  • Determine the chromosome number or DNA amount in haploid gametes, or the number and ploidy of cells after meiosis I or II.

IB Biology SL D2.1.9 Meiosis As Reduction Division Questions question 1

[Maximum number: 1]

The dolichos bean (Lablab purpureus) is cultivated as a food crop in tropical countries. Leaf cells in L. purpureus have 24 chromosomes.

State how many chromosomes there would be in male or female gametes of L. purpureus.

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