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Friday, November 15, 2013

Mitosis & Meiosis

Mitosis and meiosis have several similarities and differences. In mitosis, cells divide in four steps. First, they go through prophase. In prophase, the centrioles begin to rear end apart from each other toward pivotal poles and the nuclear tissue layer begins to breakup. In metaphase, chromosomes field of operationup at the equator of the cell, k nowadaysn as the metaphase plate. In anaphase, the centromere that connects the chromatids splits and the chromatids separate from one another. The chromatids move toward opposite ends of the cell. In anaphase, the cell also starts to split in two, forming a equipment failure furrow, the area where it pinched apart. In telophase, a nuclear membrane forms around each new cell, resulting in two girl cells. The cytoplasm then begins to divide, called cytokinesis. The difference between mitosis and meiosis I is the pairing up of homologous chromosomes in a confide to work called synapsis in meiosis I. Because of this, th is drastically changes the processes of meiosis. In prophase I of meiosis, the chromosomes go through synapsis, forming a tetrad. Everything else that happens in prophase happens. In metaphase I, the chromosomes line up at the equator of the cell, and, they stay in their homologous pairs. During anaphase I of meiosis, the centromeres do not divide. Instead, the homologous pairs separate with the entire replicated chromosome paltry to the opposite poles of the cell.
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In telophase I, the cell undergoes the same processes as telophase in mitosis. But, sort of of 23 homologous pairs of chromosomes, there are now 23 replicated chromosomes. Meiosis II is v! irtually the same at mitosis, but each cell has only 23 replicated chromosomes preferably of 46. later on the cells go through telophase II, we are left with four haploid cells. You leave out spindle eccentric formation, the differences between lay out and animal division, and crossing over. If you compulsion to get a copious essay, order it on our website: OrderCustomPaper.com

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