The Process Of Meiosis

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Meiosis is a type of cell division that occurs in sexually reproductive organisms that leads to the production of reproductive cells called gametes. The process of meiosis begins with a diploid (2n) cell, which has a full amount of chromosomes. For example, in humans, the diploid number is 46. Meiosis gives the end product of four haploid (n) gametes, which have half of the amount of DNA that their parent cells have. In humans, this haploid number is 23. The process of meiosis has many steps through which this transformation occurs, but these steps help to increase the genetic diversity of all sexually reproductive organisms.
Continuing the explanation of meiosis through a human cell, this cell will start off with 46 chromosomes prior to meiosis. This constitutes 23 homologues, or homologous chromosomes. In each pair, one comes from the mother and one from the father. Meiosis has two cycles: meiosis I and meiosis II, which are both broken down into precise phases. Before meiosis occurs, interphase I is when the DNA of the cell is doubled. Meiosis I begins
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Although it varies depending on the organism, the nuclear envelope may reappear and the DNA has a chance of unwinding back into chromatin. However, the form of the chromosomes will never change during this time. Then follows prophase II, where the nuclear envelope will once again disappear and the chromosomes will be condensed into their sister chromatid form. Metaphase II is when these sister chromatids line up on the equator and the spindle fiber attaches. This follows with anaphase II, where the sister chromatids separate and start getting pulled towards their opposing poles. The entire process ends with telophase II, where the nuclear envelope reforms, chromosomes unwind, and cytokinesis takes place to completely separate the cells. Now there are four haploid (n) daughter cells, all with varying genetic

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