Mitosis160-page6

Mitosis160-page6 - Some humans even separate the stages...

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Cell Reproduction: Mitosis - 6 Interphase Cell Division (or cell reproduction), which includes: Mitosis Process of distributing the duplicated DNA equally to two new nuclei. Mitosis is divided into 4 stages Prophase Metaphase Anaphase Telophase Cytokinesis Process of separating the cytoplasm contents of the original cell into two new cells. The events of the cell cycle are carefully regulated at checkpoints in the cycle. Cells that stay in G 0 for example, never receive the appropriate signal at the G 1 checkpoint to proceed into DNA synthesis. There are additional checkpoint signals in G 2 and during mitosis. One is at the start of anaphase. The Stages of Mitosis Mitosis is a continuum. Humans have decided to separate the process into stages for the convenience of our discussion.
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Unformatted text preview: Some humans even separate the stages into sub-stages and intermediate stages. Properly, mitosis refers to what happens to the chromosomes in the nucleus. Cytoplasmic division occurs during the accompanying cytokinesis. The Spindle Complex Since chromosomes are being distributed into new nuclei, a critical component of the process of mitosis is how the chromosomes are moved. Movement of chromosomes involves sets of microtubules, known as the spindle apparatus. Microtubules of the spindle complex extend from each pole of the cell and overlap each other at the equator of the cell. Poisons that affect microtubule function block cell division. Spindle formation is one of the events of prophase....
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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