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Evolution - Essay Example

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The process of development and diversification of living organisms from earlier forms is known as evolution. The development and diversification are dependent on the environmental factors that contribute to the reproduction and growth of species. These include the natural selection mechanisms such as food and shelter that enable species to survive, physical characteristics, also known as the genes that vary and are inherited…
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Download file to see previous pages... The complete set of genes within a living organism's cell is called genotype. On the other hand, the complete set of physical characteristics that make up the structure of an organism is called phenotype. The limitations of these factors will inhibit the reproduction process, which of course results differently from one species to another because of the differences in characteristics that are inherited and environment influences. This variation is also the result of a process called mutation, which are caused by radiation, viruses and errors during DNA replication. Genes that arise by mutation and found at the same place on a chromosome is known as allele. Thus, it can be said that evolution is the result of two opposing forces.
According to Hardy-Weinberg's Theory, the genotype and allele frequencies of a population will often remain in equilibrium, unless disturbing influences, such as mutation, is present. The equilibrium state is only possible when the genotype and allele frequencies do not change. This happens when a population has a large size, which prevents the occurrence of genetic drift, bottlenecks and founder effects. ...Download file to see next pagesRead More
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