16.1.2

Gametogenesis

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Meiosis in Plants

In mammals, gametogenesis produces sperm and egg cells. In plants, gametogenesis produces pollen grains and embryo sacs.

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Mammals

  • Spermatogenesis produces sperm cells by meiosis. Spermatogenesis occurs in the testes of males.
  • Oogenesis produces oocytes (egg cells) by meiosis. Oogenesis occurs in the ovaries of females.
    • In fertilisation, the sperm and egg fuse in the uterus following sexual intercourse.
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Plants

  • Pollen is the male gamete of plants. Microspore cells divide by meiosis to produce haploid pollen cells. This occurs in the anther of the flower of a plant. The anther is part of the stamen.
  • The embryo sac is the female gamete of plants. They are produced by meiosis in the ovule of the flower of a plant.
    • In pollination, pollen attaches to the stigma of a flowering plant. The pollen is then delivered to the ovule where it can fuse with the embryo sac.

Jump to other topics

1Cell Structure

2Biological Molecules

3Enzymes

4Cell Membranes & Transport

5The Mitotic Cell Cycle

6Nucleic Acids & Protein Synthesis

7Transport in Plants

8Transport in Mammals

9Gas Exchange

10Infectious Diseases

11Immunity

12Energy & Respiration (A2 Only)

13Photosynthesis (A2 Only)

14Homeostasis (A2 Only)

15Control & Coordination (A2 Only)

16Inherited Change (A2 Only)

17Selection & Evolution (A2 Only)

18Classification & Conservation (A2 Only)

19Genetic Technology (A2 Only)

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