Charles Darwin 's Theory Of Natural Selection

1707 Words Dec 8th, 2016 7 Pages
When Charles Darwin first developed his theory of Natural selection, he discovered that “Individuals in populations vary their “heritable” traits” (Leicht and McAllister, 2006. p. 157). And that “if a particular inherited trait confers a higher likelihood of survival and reproduction, individuals with that trait will leave more offspring than other individuals in the population” (Leicht and McAllister, 2006. p.157). With this in mind, during project 3 we took pooled data of the entire class in order to analyze extracted DNA to evaluate the genetic variation between the genes TAS2R38 and PV92. The gene TAS2R38 is located on chromosome seven, while PV92 is located on chromosome sixteen. TAS2R38 encodes a protein that is responsible for some people being able to taste bitter things like Phenylthiocarbamide paper also known as “PTC paper” (Wooding, 2006). Unlike the TAS2R38 gene, PV92 “does not encode a protein” (Leicht and McAllister, 2006). It, instead, is an Alu element and uses primers to insert itself in PCR products in order to determine whether or not it is present (Batzer et al., 1994). Since the TAS2R38 and PV92 genes are well known to be easily distinguishable using gel electrophoresis for PCR products, we used them because neither loci will express any fixation or any loss of an allele in small populations (Leicht and McAllister, 2006). Like in any biological field we used a Polymerase Chain Reaction (or PCR for short), which is used to amplify “specific DNA…
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