Author: LeRoy Technology

Mitosis Stages

Prophase
is when the chromosomes condense and some spindle fibers form. The nuclear membrane disappears as well as the nucleolus. The nuclear envelope begins to break down and the spindle fibers start extending to both poles of the cell. Centrioles are also being produced in the stage, and chromatin becomes chromosomes so both cells will have the right amount of chromosomes can be distributed equally when the cell splits.

Metaphase
is the chromosomes lining up in the center of the cell, the spindle fibers also attach themselves to the centromere of the chromosomes this causes tension in the middle of the cell. It is like a tug of war between two people with the exact same strength and this leads to the destruction of cyclin that is in the cell. Cyclin is protein that is associated with the cell cycle and is believed to initiate certain processes of mitosis.

Anaphase
is the process of when sister chromatids separate to opposite sides of the cell. The spindle fibers shorten up and the kinetochores separate. The kinetochores are the substances that the spindle fibers attach to the chromatid. The kinetochores are usually located at or close by to the centromere. In anaphase nuclei begin to form within the cell as well.

Telophase
has new nuclei from and the chromosomes begin to unfold and then go back into chromatin from preparing for interphase (stage one of mitosis). The daughter chromosomes arrive at the poles and the spindle fibers disappear. The nuclear membrane also begins to reform at both ends of the cell. the kinetochores are dissmissed as they are not needed anymore