Mitosis--which is a continuous process occurring in five stages: prophase, prometaphase, metaphase, anaphase, and telophase--is the cast of the nucleus. During prophase, changes occur in the cytoplasm and the nucleus of the cadre. Basically, in the nucleus, chromatin granule fibers become more tightly coiled-up, condensing into discrete chromosomes. Also, the nucleoli disappear. each duplicated chromosome appears as dickens identical infant chromatids join together. Mitotic braid begins to anatomy in cytoplasm (it is made of microtubules radiating from dickens centrosomes). Next is prometaphase, where the nuclear envelope surrounding the nucleus fragments. Bundles of microtubules impart from each pole toward middle of cellular phone. Kinetochore develops in kinetochore region of chromosomes. In metaphase, centrosomes are at opposite ends of the poles of the cell; the chromosomes meet on the metaphase plate. For each chromosome, the kinetochores of the sis ch romatids are attached to microtubules coming from opposite poles of the cell. Entire apparatus of microtubules = spindle.
In anaphase, sister chromatids separate from each other and move toward opposite ends of the cell, as their kinetochore microtubules shorten. Thus, the two poles of the cell have equivalent and withdraw collections of chromosomes. Lastly, in telophase, nonkinetochore microtubules elongate the cell still more, and daughter nuclei determine at the two poles of the cell. Nuclear envelopes arise from fragments. Mitosis--the equal part of one nucleus into two genetically identical nuclei--i s in conclusion complete. ! If you want to get a full essay, commit it on our website:
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