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Cell Division - School Essays

Cell Division

Cells can divide in three ways, binary fission, mitosis, and meiosis. Prokaryotes reproduce by binary fission in which the cell basically divides in half. The single, circular DNA, attached to the plasma membrane, duplicates, and the cell begins to grow. Continued growth of the cell separates the chromosomes, and eventually the plasma membrane and cell wall pinch in and create two new cells. Eukaryotes go through a cycle, including interphase and the mitotic phase. Interphase is divided into four stages, G1, S, G2, and M. In G1, cell growth takes place. The organelles get larger and the cell prepares for mitosis. The reproduction of DNA and the replication of chromosomes occur in ...

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In Metaphase, the chromosomes line up along the metaphase plate. The centromeres are all aligned and the sister chromatids straddle the metaphase plate. Anaphase beings when the sister chromatids are pulled away from each other. The chromosomess begin moving along the microtubles towards opposite ends of the cell, which is now in an oval shape. At telophase, the nonkinetochore microtubules elongate the cell even more, and daughter nuclei begin to form. Nuclear envelopes are reconstructed with fragments from the parent cell. Cytokinesis is normally underway at this point also. In animal cells, cytokinesis begins with a cleavage furrow. Microfilaments form a ring just inside the plasma membrane at the location of the furrowing. These microfilaments contract and the cleavage deepens until the cell is split in two. In plant cells, a cell plate forms during telophase by vesicles from the Golgi apparatus. The fusion of vesicles forms two membranes that eventually unite. ...

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Cell Division. (2007, December 3). Retrieved March 7, 2026, from http://www.essayworld.com/essays/Cell-Division/75258

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PAPER DETAILS

Added: 12/3/2007 04:15:37 AM
Category: Science & Nature
Type: Free Paper
Words: 395
Pages: 2

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