In animal cells, cytokinesis involves

the separation of sister chromatids

the contraction of the contractile ring of microfilament

depolymerisation of kinetochore microtubules

a protein kinase that phosphorylates other enzymes

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(b) In animal cells, cytokinesis is achieved through the constriction of the cell by a ring of contractile microfilaments consisting of actin and myosin. The process can be divided to the following distinct steps; anaphase spindle reorganization, actin-myosin ring assembly and contraction, and abscission.
In animal cells, during anaphase there is separation of sister chromatids. During metaphase, microtubules associated with kinetochores undergo depolymerization. Protein kinases play a major role in cellular activation processes. Kinase is an enzyme that phosphorylates proteins. Phosphatase is an enzyme that dephosphorylates proteins, effectively undoing the action of kinase.

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