Tuesday, August 13, 2013

Freeresponse Meiosis

Free Response: miosis light reflex is known as the particle of sex cadres (gametes). myosis occurs in organisms that re pay off sexually. Meiosis is a type of jail cellular phone grade in which the chromosomes are non totally re put outd. Instead of profuse cell division, the chromosome number is halved so that these cells merchantman be used in sexual reproduction. The connection of dickens sex cells result produce a cell with the full number of chromosomes. That cell will and then carry on to class in fleck to create a untoughened organism. Meiosis is cleaved up into several stages, Meiosis I and Meiosis II. They are really to regular mitosis, but four cells are produced instead of the deuce by normal cell division. In Meiosis I, the homologic matess in a diploid cell separate to produce 2 haploid cells. haploid cells are cells with a champion set of chromosomes. The future(a) phase, prophase I, includes the homologic chromosomes pair and the crossing all over. Crossing over is a exercise where ii chromosomes pair up and fox sections of their DNA. Matching regions on interconnected chromosomes break and then reconnect to the separate chromosomes, which allows for variations in genes. In metaphase I, homologous pairs of chromosomes move to the metaphase plate.
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Microtubules appear from the centrioles and enlarge the homologous pairs which then furrow up in the marrow of the cell. Anaphase I is the next step, where the chromosomes are pulled apart by the microtubules from metaphase I. This forms deuce haploid sets of chromosomes. The kick the set step before the murder separation of the cell is Telophase I. In this phase, the chromosomes reach the poles. The nuclear tissue layer forms around the two sets of chromosomes and cytokinesis occurs. Meiosis II now starts. The two haploid cells begin to divide again. In prophase II, the nucleoli and nuclear envelope start to disappear. Metaphase II is the similar as Metaphase I, where the chromosomes move to the nitty-gritty of the cell. In anaphase II, the chromosomes are notify and the microtubules pull the...If you want to number a full essay, ordinance it on our website: Ordercustompaper.com

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