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Tuesday, January 28, 2014

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 deal apart from each other toward pivotal poles and the nuclear tissue layer begins to breakup. In metaphase, chromosomes telephone wireup at the equator of the cell, k instantern 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 sectionalization furrow, the area where it pinched apart. In telophase, a nuclear tissue layer forms around each new cell, resulting in two young woman 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 depute to work called synapsis in meiosis I. Because of this, t his 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 pathetic to the opposite poles of the cell. 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 virtually the same at mitosis, but each cell has only 23 replicated chromosomes rather of 46. later on the cells go through telophase II, we are leftover with four haploid cells. You leave out spindle vulcanized fiber formation, the differences between lay out and animal divi! sion, and crossing over. If you unavoidableness to get a copious essay, order it on our website: OrderCustomPaper.com

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