mitosis - Mitosis and Meiosis are both forms of cellular...

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Mitosis and Meiosis are both forms of cellular reproduction. There are several similarities and differences in both processes. Mitosis results in the production of somatic cells needed for growth and replacement, and repair. Meiosis results in the production of haploid gametes and in the process, meiosis allows for genetic recombination. This increases genetic variability in a population. Most cells of the human body are capable of reproducing themselves through mitosis. The rate at which cells divide is highly variable: blood cells and cells lining mucosal surfaces are constantly being replaced whereas most neurons following fetal growth enter into the G 0 phase of the cell cycle and do not further divide. Cells capable of division alternate between interphase and mitosis. Interphase is divided into G1, S (DNA synthesis) and G2. If a cell has passed all checkpoints during this interphase cycle, it will enter into mitosis. Mitosis is divided into several stages: During prophase, the DNA condenses, becomes tightly bound by histones and other proteins and the chromosomes become visible under the light microscope. Each chromosome consists of two sister chromatids. During prophase, the centrioles replicate and move to opposite poles of the cell where they assemble the mitotic spindle which consists of microtubules (tubulin). At the same time the nuclear envelope is breaking up. Metaphase. The chromosomes align themselves on the metaphase plate at the center of the cell and each chromosome is attached to microtubules of the mitotic spindle. each chromosome consists of the two sister chromatids joined together at the centromere. Anaphase:
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mitosis - Mitosis and Meiosis are both forms of cellular...

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