Meiosis 1

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Meiosis is the production of gametes (sperm and egg cells)

  • it's a form of nuclear division that produces haploid gametes
  • gametes are haploid as they have 23 chromosomes (half the number in a normal human body cell)
  • during fertilisation gametes must be haploid as when they 'fuse it restores the diploid number' which will 'sustain a consistent number of chromosomes for future generations' and thus 'prevent genetic abnormalities'
  •  There are 2 parts to meiosis: Meiosis I and Meiosis II

1) Interphase occurs (the same as in mitosis)

2) Prophase I:

  - the 'nuclear membrane breaks down' and 'centrioles move to opposite poles' and    


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