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Unformatted text preview: Phase # Chromosomes # Chromatids Prophase 46 92 Metaphase 46 92 Anaphase 92 92 Telophase 92 92 Chromosome movement Microtubules lengthen and shorten by the addition or removal of tubulin dimers. Click here for details in the chapter on cells. Kinetochore microtubules shorten in the region of the kinetochore, pulling the chromosomes apart. Polar microtubules push against each other and thus, push the two centrosomes apart. This, in turn, also pulls the chromosomes apart. The chromosomes move toward poles of cell. Cytokinesis (division of the cell) begins in anaphase. A cleavage furrow forms as actin filaments underneath the plasma membrane constrict in a band called the contractile ring. Two cells will be produced as this process continues....
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This note was uploaded on 12/15/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10