AP Biology Meiosis Essay

pupillary reflex is the operation in sexually reproducing organisms where stalls divide. The cubicles produced during myosis have i-half the chromosome number as the original cell. There ar both cell divisions in pupillary reflex, meiosis l and meiosis ll. These cell divisions produce 4 hapolid daughter cells. Haploid cells involve only iodine set of chromosomes, which is written as n. Meiosis consists of nine phases. In meiosis the interphase l the chromosomes replicate and the central body duplicates in one diploid cell. Diploid cells have two sets of chromosomes, they received one from from each one parent. During prophase l the thermonuclear envelope fragments and spindle microtubules form betwixt the centrosomes. Homologous chromosomes orthodontic braces to make two baby chromatids. This is called synapsis. Chromatids of homologous pairs exchange segments when they ships bell ringer all over. At metaphase l, the pairs line up on the metaphase scale of measure ment. Microtubules from one perch attach to the kinetochore of one homologous chromosome, speckle microtubules from the other pole attach to the kinetochore of the other pair. During anaphase l the microtubules bum shorter pulling the homologous pairs towards opposite poles. At telophase l two haploidic cells form exactly the chromosomes are calm down double. Meiosis ll separates the sister chromatids. During prophase ll the sister chromatids in each cell begin moving towards the equator. At metaphase ll the chromosomes align on the metaphase plate in each cell. The process of anaphase ll pulls the sister chromosomes to opposite poles in each cell.

Duri! ng telophase ll each cell forms a nuclei and cytokinesis splits the cells apart. Four genetically different haploid cells are produced. Independent assortment is differences amidst the genes. version can occur in meiosis when the chromosomes cross over and during stochastic fertilization. Random fertilization is when a gamete from the mother unites with the haploid from the father to produce... It was quite informative, but you should fix the layout of your text because it is pique to read it when the distances between the sentences is big. You should also have a termination and introduction. Otherwise it was ok If you want to get a dear essay, order it on our website: OrderCustomPaper.com

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