Mitosis - Mitosis ,meaningthreads.Whenmitosiswasfirst ,,...

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Mitosis The term  mitosis  is derived from the Latin stem  mito,  meaning “threads.” When mitosis was first  described a century ago, scientists had seen “threads” within cells, so they gave the name mitosis to  the process of “thread movement.” During mitosis, the nuclear material becomes visible as threadlike  chromosomes. The chromosomes organize in the center of the cell, and then they separate, and 46  chromosomes move into each new cell that forms.  Mitosis is a continuous process, but for convenience in denoting which portion of the process is  taking place, scientists divide mitosis into a series of phases: prophase, metaphase, anaphase,  telophase, and cytokinesis (see Figure  1  ):  Prophase:  Mitosis begins with the condensation of the chromosomes to form visible  threads in the phase called prophase. Two copies of each chromosome 
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.

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