Answer and Explanation:
Mitosis occurs at the sites of growth and development of new tissues. The stages of mitosis include;
This is the initial phase. The chromosomes in the nucleus become visible as thin coiled threads. In animals, the centrosome found in the cytoplsm divdes to form two centrioles. The chromosomes become tightly coiled and shorter. From each centriole, fine fibres develop and elongate to form spindle apparatus. The nucleolus becomes dispersed in the nucleus and disappears. The nuclear membrane also break and disappears.
The pairs of chromatids align along the equator of the spindle apparatus and are attached to it at their centromeres.
The centromere of each chromosome splits and the chromatids separate. Each chromatid moves to the opposite poles of the cell. The chromatids appear as V--shaped.
The spindle fibres disintegrate and disappear. New nuclear membrane forma around each set of chromatids. A nucleolus develops in the nucleus of each daughter cell. The cytoplasm now divides in a process caled cytokinesis. In animals, an invagination develops at the plasmalemma near the equator of the cell.
