biology 2 chapter 5.1

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Cell Division

  • In body cells, chromosomes are found in pairs
  • Body cells need to divide to produce new cells for growth or repair
  • Mitosis is the type of cell division that produces identical new cells 
  • Animal cells differentiate early in the development but many plant cells maintain the ability to differentiate throughout their life 

Cell division in sexual reproduction

  • Sex cells are produced by meiosis
  • sex cells have one set of chromosomes 
  • Sexual reproduction gives rise to variation

Stem Cells

  • Stem cells are not specialised but can differentiate into many types of different cells when required
  • Stem


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