Mitosis

Prophase:

Chromatin fibres coil and condense.

The nucleolus dissapperars and the nuclear membrane starts to break down.

Centrioles move to the poles spindles form and attach to centromeres by the end the nuclear envelope has disapperead

Metaphase:

Chromosomes are moved by the spindle fibres to form the metaphase plate and the chromosomes are held in place.

Anaphase: The centromeres holding together pairs of chromotids in each chromosome are divided when the spindle fibres pull them apart.

Telophase: Chromatids have reached the poles and are now chromosomes. They assemble at each pole and the nuclear envelope reforms around them. The chromosomes uncoil and the nucleolus is formed.

Cytokinsis: The cell actually separates into two.