plumiMeiosis: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 2.1.6.3 Meiosis, 2016–2025, with mark schemes and examiner’s reports where available.
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Q17(b)(i)
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All 22 questions on Meiosis, as a list
- June 2025, Paper 2, Q17(b)(i) (2 marks): The offspring are not the same sex as the parent. Identify two other reasons why parthenogenesis in Komodo dragons is not an example of cloning. 1 2 [2]
- June 2025, AS Paper 1, Q21(a)(i) (1 mark): State the names of stages R and S. Stage R Stage S [1]
- June 2025, AS Paper 1, Q21(a)(ii) (2 marks): Describe two features of homologous chromosomes. 1 2 [2]
- June 2025, AS Paper 1, Q21(a)(iii) (2 marks): Describe what is happening during stage S. [2]
- June 2025, AS Paper 1, Q21(b)(ii) (3 marks): Meiosis allows organisms to make gametes. Describe the three processes that occur during meiosis to cause genetic variation in gametes and state the stage in wh
- June 2024, Paper 2, Q21(b)(i) (2 marks): At the beginning of mitosis and meiosis, the nuclear envelope disintegrates. Identify two other similarities between prophase in mitosis and prophase 1 of meios
- June 2024, Paper 2, Q21(b)(ii) (1 mark): Identify one difference between prophase in mitosis and prophase 2 of meiosis. [1]
- June 2023, Paper 2, Q16(d) (2 marks): During meiosis, the independent assortment of chromosomes leads to the formation of genetically different gametes. Gametes of the western clawed frog contain 10
- June 2023, AS Paper 2, Q6(a)(iii) (3 marks): When Komodo dragons reproduce sexually the gametes are produced by meiosis. Explain how meiosis produces genetic variation in the offspring. [3]
- June 2022, Paper 3, Q4(b) (3 marks): Both A. aerophoba and S. fasciatum reproduce sexually, but under particular conditions they are both able to reproduce asexually. In asexual reproduction in A.
- June 2022, AS Paper 2, Q2(c) (4 marks): Compare prophase in mitosis with prophase in meiosis. [4]
- November 2021, AS Paper 1, Q18 (1 mark): Which row, A to D, shows the stages of meiosis where crossing over and independent assortment occur? Crossing over Independent assortment A prophase 1 metaphase
- November 2020, Paper 2, Q19(b)(i) (6 marks): When conditions are not favourable, Hydra reproduces sexually. This often happens in the winter. Cells in the body wall produce sperms and eggs by meiosis. Larg
- November 2020, Paper 2, Q19(c)(i) (1 mark): The zygote grows into the sporophyte by mitosis. The haploid gametophyte of one species of Funaria contains 28 chromosomes. A single DNA molecule contains two s
- November 2020, Paper 2, Q19(c)(ii) (1 mark): Mark an X on Fig. 19.2 at the point at which meiosis occurs. ..[1] Answer on Fig. 19.2
- June 2017, Paper 1, Q5 (1 mark): During cell division, the chromosome number in the cells changes. The following sequences describe the chromosome number in cells before, during and after diffe
- June 2017, Paper 1, Q19(a) (3 marks): Three phases of meiosis are listed below. Match each phase of meiosis to a letter on Fig. 19.1. Metaphase 1 occurs during the stage labelled Telophase 2 occurs
- June 2017, Paper 2, Q4 (1 mark): The haploid chromosome number in the koala, Phascolarctos cinereus, is 8. Independent assortment of chromosomes in meiosis contributes to genetic variation in t
- June 2017, AS Paper 2, Q1(b)(i) (1 mark): Identify the stage of meiosis 1 shown in the cell labelled A. [1]
- June 2017, AS Paper 2, Q1(b)(ii) (2 marks): Based only on your observations of Fig. 1.2, state two reasons for your answer in (b)(i). [2]
- June 2017, AS Paper 2, Q1(b)(iii) (3 marks): Another stage of meiosis is metaphase 1. Explain how the organisation of homologous chromosomes during metaphase 1 increases genetic variation. [3]
- June 2016, AS Paper 2, Q2(a) (3 marks): Mitosis and meiosis play an important role in the life cycles of organisms. Fig. 2.1 and Fig. 2.2 represent an outline of the life cycles of two different organ
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