Then Prometaphase which begins with the collapse of nuclear envelope, allowing microtubules to attach to kinetochores. Metaphase is signified by the lining of the chromosomes exactly midway between the two centrosomes. The tension builds as the spindles pull on the chromosomes in opposite directions. A naphase starts when sister chromatid pairs split apart and each chromosome goes towards their centrosomes. Also cytokinesis begins.
Mitosis is in essence the division of the nucleus to generate two genetically identical nuclei.
But cytokinesis is when the cell divides to produce two distinct cells. They are not necessarily linked. Two classes of proteins are fundamental in cell cycle regulation. The level of cyclin in a cell oscillates while the Cdk stays the same. When the level of cyclin is high enough, cyclin and cdk form an inactive cyclin-Cdk complex.