There are two process.They are
(1) Karyokinesis.
(2) Cytokinesis
(1) Karyokiriesis:
It is divided into following sub-stages.
- The duplicated chromosomes undergo condensation (become Short and thick).
- Each chromosome has two chromatids and *** attached to each other at the region of the centromere.
- Centrioles are duplicated and begin to move towards the other pole of the cell.
- Aster begins to appear around each centriole. Spindle fibers begin to appear.
- Nuclear membranes and Nucleolus disappear
- Spindle fibres are completely formed.
- Chromosomes are highly condensed and they arrange at the equator.
- Spindle fibre attached to the centromere and arms project in a different direction.
(C) Anaphase :
The spindle fibers become short and two chromatids of each chromosome separate and move away from the equator to the opposite poles. The moving chromosome exhibit different shapes like V or J shape.
(d) Telophase
The daughter chromosomes arrived at the poles start uncoiling become thin. Nuclear membrane and nucleolus reappear around the chromosome at each pole. Spindle fibres disappear.
(ii) Cytokinesis:
A furrow develops in the middle of the cell which depends at the centre and divides cytoplasm into two equal parts.
