Division of the nucleus during cell division is called
Karyokinesis
Division of the nucleus during cell division is called karyokinesis and is followed by Cytokinesis, the division of the cell cytoplasm. Metakinesis is the separation of sister chromatids and their movement to opposite poles during anaphase stage of mitosis. Amphimixis is the union or the fusion of male and the female gametes in sexual reproduction.