nuclear division (PMAT) → 2 nuclei phase of the cell cycle
The nuclear division (also known as mitosis) occurs in the PMAT phase of the cell cycle. In this phase, the cell undergoes several steps to divide its nucleus into two separate nuclei. These steps are:
1. Prophase: The chromosomes condense and become visible. The nuclear envelope begins to break down, and the mitotic spindle forms.
2. Metaphase: The chromosomes align at the equator of the cell, known as the metaphase plate. The spindle fibers attach to the centromeres of each chromosome.
3. Anaphase: The spindle fibers contract, pulling the sister chromatids apart. The separated chromatids move towards opposite poles of the cell.
4. Telophase: The separated chromatids reach the poles of the cell. A new nuclear envelope forms around each set of chromosomes, and the chromosomes begin to decondense.
After nuclear division is completed, the cell enters the next phase of the cell cycle called cytokinesis, where the cytoplasm divides, resulting in the formation of two daughter cells, each with its own nucleus.