Different Forms Of Genes That Governor A Single Genetic Trait

1796 Words Apr 25th, 2016 null Page
Introduction
Alleles are different forms of genes that governor a single genetic trait (Tortora &
Derrickson, 2009, p. 1118). Genes, a section of a DNA molecule, are heritable traits that are produced by the DNA of an individual (Tortora & Derrickson, 2009, p. 53). Individuals in a population can be born with multiple different genes or characteristics (Freeman et al., 2014, p. 5). The characteristics that change throughout a population over time are known as evolution (Freeman et al., 2014, p. 5). Natural selection is a process developed by Darwin and Wallace—which is used to explain how evolution happens (Freeman et al., 2014, p. 454). Natural selection can happen when either an individual in a population has heritable characteristics or when individuals of a population in a given environment alters the characteristics to which would help them either survive or reproduce more efficiently (Freeman et al., 2014, p. 454). Once a certain characteristic is developed that can help the individual survive or reproduce, it can be passed on to its offspring (Freeman et al., 2014, p. 454). Over time, this characteristic will become common to the population since this characteristic helps with either reproduction or survival (Freeman et al., 2014, p. 454). Because of this, according to Freeman in the Biological Science textbook, “Natural selection acts on individuals, but evolutionary change occurs in populations” (Freeman et al., 2014, p. 454).
Evolution by natural selection has…

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