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  • Chromosomes shorten and thicken as DNA is coiled.
  • Each chromosome visible as 2 chromatids joined at centre.
  • Nuclear envelope breaks into small pieces
  • Centrioles organise fibrous proteins into the spindle
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  • Chromosomes held on spindle at middle of the cell
  • Each chromosome attached to spindle on either side of its centromere (the circle separating the chromatids)
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  • Chromatids break apart from the centromere and line up at opposite ends of the cell by the spindle
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  • Nuclear envelopes reform around the chromatids that have reached the poles of the cell
  • Each new nucleus has same number of chromosomes as original parent cell
  • Nuclei genetically identical to each other
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