Mitosis By: Tim Goudemont

What is Mitosis? Mitosis is a process where a single cell divides into two identical daughter cells (cell division). But the major purpose of mitosis is for growth and to replace worn out cells.

Interphase The cell grows to its grown up size, then it makes a copy of the DNA. Once it copied, it makes it ready to divide it into two cells. DNA is copied because the two daughter cells have to be identical.

Prophase The nucleolus disappears during prophase. Chromosomes become more coiled and can be viewed under a light microscope. The nuclear envelope disappears at the end of prophase. The chromosomes become coiled because it is easier to transfer it if it’s really long.

Metaphase The centrosomes are at opposite poles of the cell. The chromosomes, now at their most highly coiled and condensed The chromosomes are at The equator (in the middle).

Anaphase Anaphase begins when the duplicated centromeres of each pair of sister chromatids separate, and the now-daughter chromosomes begin moving toward opposite poles of the cell. At the end of anaphase, a complete set of chromosomes has assembled at each pole of the cell.

Telophase The chromosomes begin to uncoil and eventually assume the extended state characteristic of interphase. A nuclear envelope reforms around each chromosome set, the spindle disappears, and the nucleolus reforms. Nuclear division by mitosis is complete at this point.

Cytokinesis The cell membrane pinches in around the middle of the cell. The cell breaks apart in two cells. Each daughter cell ends up with the same set of chromosomes

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