- DNA in nucleus condenses.
- Chromosomes visible as sister chromatids joined by the centromere.
- Nuclear membrane disintegrates.
- Spindle apparatus forms.
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- Centromeres line up along the equator of the cell.
- Spindle fibres attach to the chromosomes and pull them apart at the centromeres.
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- Spindle fibres shorten, pulling the chromosomes to the poles.
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- When the chromosomes reach opposite poles the nuclei reform around them.
- Spindle apparatus disappears.
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