Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
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<strong>Mitosis</strong>: The Stages of <strong>Cell</strong> <strong>Division</strong><br />
1. Prophase<br />
Chromatin condenses into chromosomes, which appear<br />
as two sister chromatids joined by a centromere.<br />
Nucleoli disappear.<br />
Nuclear envelope breaks apart.<br />
In animal cells, mitotic spindle begins to form as<br />
mictotubules grow out of two centrosomes or<br />
microtubule organizing centers (MTOCs).<br />
• Each centrosome is made up of a pair of centrioles.<br />
Microtubules attach to kinetochores on chromatids <strong>and</strong><br />
begin to move chromosomes towards center of cell.<br />
Centrosomes begin migrating to opposite poles of cell.