Mitosis
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Cell division results in two identical daughter cells, each very similar to the original parent cell (Edwards, 2000, 42). In eukaryotes, cell division is carried out in two separate phases: the first phase separates the chromosomes in the nucleus, and the second stage, known as cytokinesis, separates the cytoplasmic organelles between the two daughter cells. Each species has a characteristic number of chromosomes in the nucleus - 46 in the human case - in diploid pairs. The somatic cells of the organism contain a full diploid number of chromosomes while the eggs and sperm each contain the haploid number (23 in humans). Mitosis is the process by which the chromosome pairs in the nucleus divide into two sets for transfer of one set to each of the daughter cells (43). During the interphase of the cell cycle, the chromosomes are long and thin, and the DNA molecules replicate so that each chromosome has an exact copy of itself by the end of the phase. There are four phases to mitosis. In the first phase, prophase, the chromosomes become shorter and thicker, and each chromosome consists of two chromatids held together at the center by a centromere. The nuclear membrane begins to disintegrate at this phase, and spindle fibers form from the centromeres and extend to the poles of the cells. In the cells of animals, fungi, and algae, and some ferns, the centrioles replicate and move towards the poles of the cells, and the chromosomes migrate to the equator of the
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Some common words found in the essay are:
Mitosis Cell, Anaphase II, Meiosis II, Metaphase II, spindle fibers, nuclear membrane, edwards 2000, wilson 2000, daughter cells, metaphase ii, poles cells, References Edwards, Barron's Wilson, Blackwell Scientific, wilson 2000 133, 2000 133, 46 human, chromosomes shorter thicker, homologous pair, double stranded chromosomes,
Approximate Word count = 1113
Approximate Pages = 4 (250 words per page)
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