D2.1.9—Meiosis as reduction division
Meiosis is a reduction division in which homologous chromosomes separate first, producing haploid nuclei after two divisions in gamete formation.
- Syllabus
- First assessment 2025
- Objective
- D2.1.9
- Level
- SL
Exam analysis
Chance of appearing9%of analysed past papers
Latest appearanceMay 2024
Most common paperPaper1
Typical marks1
Common command terms
- State
- Identify
- Outline
Scoring notes
- Common mistake
- Saying sister chromatids separate in meiosis I instead of homologous chromosomes.
Recent exam appearances
May 2024Paper2 ["SL"] · TZ14(a)[ 1 ]D2.1.9—Meiosis as reduction division
November 2023Paper1 ["SL"] · TZ215[ 1 ]D2.1.9—Meiosis as reduction division
November 2023Paper1 ["SL"] · TZ115[ 1 ]D2.1.9—Meiosis as reduction division
May 2023Paper2 ["SL"] · TZ22(a)[ 1 ]D2.1.9—Meiosis as reduction division
November 2022Paper1 ["SL"] · TZ014[ 1 ]D2.1.9—Meiosis as reduction division
Practice this objective
Coverage 2010–2024 · Updated 16 Jul 2026
Concept essentials
- Meiosis halves chromosome number to produce haploid nuclei.
- Homologous chromosomes separate during meiosis I.
- Sister chromatids separate during meiosis II.
- One DNA replication is followed by two meiotic divisions.
- Meiosis can produce four haploid cells from one diploid cell.