Freeresponse Meiosis

Free Response: miosis myosis is known as the division of sex cadres (gametes). light reflex occurs in organisms that reproduce sexually. Meiosis is a type of cubicle division in which the chromosomes ar non completely reproduced. Instead of wax cubicle division, the chromosome number is halved so that these cells can be used in sexual reproduction. The companionship of ii sex cells will produce a cell with the full number of chromosomes. That cell will and so shoot on to class in post to create a sore organism. Meiosis is divided up into several stages, Meiosis I and Meiosis II. They ar very to regular mitosis, solely tetrad cells are produced instead of the two by normal cell division. In Meiosis I, the homologous pairs in a diploid cell separate to produce two monoploid cells. monoploid cells are cells with a single set of chromosomes. The future(a) phase, prophase I, includes the homologous chromosomes pair and the crossing over. Crossing over is a coif fure where two chromosomes pair up and switch sections of their DNA. Matching regions on matching chromosomes break and then reconnect to the other chromosomes, which allows for variations in genes. In metaphase I, homologous pairs of chromosomes move to the metaphase plate.

Microtubules appear from the centrioles and attach the homologous pairs which then line up in the middle of the cell. Anaphase I is the next step, where the chromosomes are pulled apart by the microtubules from metaphase I. This forms two haploid sets of chromosomes. The forfeit the bucket step before the complete separation of the cell is Telo phase I. In this phase, the chromosomes reac! h the poles. The nuclear membrane forms around the two sets of chromosomes and cytokinesis occurs. Meiosis II now starts. The two haploid cells get off to divide again. In prophase II, the nucleoli and nuclear envelope start to disappear. Metaphase II is the identical as Metaphase I, where the chromosomes move to the middle of the cell. In anaphase II, the chromosomes are reveal and the microtubules pull the...If you want to get a full essay, order it on our website: BestEssayCheap.com

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