GCSE Combined Science (AQA)

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The Cell Cycle

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Cell Biology Cell Division

The Cell Cycle

2:08 Cell Division
Spec 4.1.2.2
Previous Genes & Alleles Next Interphase
  • Multicellular organisms require cell division for growth, development, repair, and replacement.
  • Normal cell division occurs through a process called mitosis.
  • Mitosis is crucial for the growth and development of both plants and animals, beginning post-fertilization.
  • It is also used to repair damaged tissues and replace old cells, such as constantly shedding and replacing skin cells.
  • New cells produced during mitosis contain genetic information identical to the parent cell.
  • A single diploid parent cell divides to produce two identical diploid daughter cells.
  • Cell division occurs in a series of stages known as the cell cycle, which includes three main stages.
  • The cell cycle stages are:
  • Interphase: the cell prepares for division and spends most of its life in this stage.
  • Mitosis: the cell divides its contents, preparing to split into two.
  • Cytokinesis: the final part of the cell cycle where the cell physically splits into two, involving the division of the cytoplasm.
  • After cytokinesis, the cell cycle begins anew in the resulting cells.
  • For exams, it is important to describe the three stages of the cell cycle, including mitosis.

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