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Mitosis
From Citizendium, the Citizens' Compendium
Mitosis is the process during which an eukaryotic cell devices its nucleus.
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Subphases
The events during the mitosis happen continuously and are conventionally divided into four or five subphases (not every source treats the prometaphase as distinct phase).
Prophase
The condensation of the replicated chromosomes is the first sign that a cell enters into the prophase and into mitosis. Those are first visible as thin threads within the nucleus. The miotic spindle apparatus forms outside of the nucleus between the two centrosomes that seperate themselves and begin to move towards opposite poles of the cell.
Prometaphase
The prometaphase begins with the break down of the nuclear membrane. The chromosomes attach through the kinetochore to the spindle.
Metaphase
The chromosomes arrange themselves in the equatorial plane of the spindle.
Anaphase
The chromatids separate and move to opposite poles of the spindle.
Telophase
New nuclear membranes form around each of chromosome sets and build two daughter nuclei.
