Cellular Reproduction Essay -- Biology

jail cellular ReproductionCellular Reproduction is the process by which all life history thingsproduce new beings similar or analogous to themselves. This isessential in that if a species were not suitable to reproduce, thatspecies would quickly become extinct. Al shipway, reproduction consists ofa basic pattern the conversion by a p bent organism of raw bodilysinto offspring or cells that will later develop into offspring.(Encarta, 2) In almost all animal organisms, reproduction occursduring or after the purpose of maximum growth. (Fichter, 16). But inPlants, which continue to grow through appear their lifetime, thereforemaking the process more complex. Plants reproduction is usuallycaused by a stimulant, mostly environmental or growth factors. Thereproductive process, whether vegetal or fetch upual always involves anexchange in hereditary material from the parent(s) so that the neworganism may also be able to reproduce. Reproductive processes can becategorized in many an other(prenominal) diffrent ways although the most common is to putthem into either neuter reproduction or sexual reproduction. Asexualreproduction is the process by which a individual organism gives rise totwo or more daughter cells. close to single celled organisms reproduce bythe asexual process known as fission, which is commonly calledmitosis. Fission (or Mitosis) is the division of sensation cell into twoidentical daughter cells. Inter level, the first phase of the cellcycle and also the phase before mitosis, starts as soon as the cell isborn. Interphase is broken up into three phases, G1, S, and G2. During the G1 phase, the cell increases in mass except for the chromosomes,which stay the same, uncoiled. Protein implication is also occurringrapidly in this phase. If a cell doesnt divide further, it cadaverpermanently in the G1 phase. Next is the S phase, in which the mass ofthe cell continues to increase, and DNA is duplicated, and then thechromosomes divide to form ident ical sister chromatids wedded by acentromere. (Harold, 45). During the G2 phase of Interphase, the cellbecomes double its mass at birth, the chromosomes begin to shorten andcoil, and the centrioles appear, the cell is now ready to enter intomitosis. In the first and longest phase of mitosis, prophase, thechromosomes become visible and the centrioles split in half and thenmove to opposite sides of th... ...ont seperatecorrectly. This is called nondisjunction. There are three types ofnondisjunction, Trisomy- when a gamete with an wasted chromosome isfertiized with a normal gamete. Monosomy- when a gamete with onechromosome is missing and is then fertilized by normal gamete. AndTrioloidy- where both zygotes have an extra chromosome. Reproductionis as essential to a species as food, water, or shelter. If a speciescannot reproduce anymore, that species will eventually become extinct.There are many means of reproduction but primarily only two asexualand sexual. In asexual reproduction, One organism gives a part or itswhole self, in order to give rise to two or more new organisms. Duringsexual reproduction, two parents each form sex cells, which unite, andeventually form a new individual.Works cited Biggs, Alton & others. Biology The dynamics of Life.Glencoe McGraw-Hill. New York, NY, 2000 Encarta Encyclopedia. CD-ROM.1998 Fichter, Sheila. Reproduction. Universal Press Columbus, OH,1994 Harold, Christopher. Cells A Guided Tour. Simon and Schuster New York, NY, 1987 ONeil, Franklin. Cells. McMeel Publishing, Inc. Atlanta, GA, 1990