Lab #2 Anthrop.docx - Anth 105 Human Species Lab 2 Report...

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Anth. 105 Human Species – Lab 2 ReportOctober 23, 2017Introduction:Evolution is the change in the typical feature/ trait of a species over several generations due to different forces. There are four forces of evolution these include: mutation, drift, flow, andnatural selection. Mutation occurs when there is a new allele that arises through an error in development. An example of mutation is the sickle cell anemia, which is caused by the exchange in the beta-hemoglobin gene. This is a situation where there aren’t enough of healthy red blood cells to import oxygen throughout the body. Another type of evolution is drift, that’s when allelesare lost through random chance. There are two types of genetic drift, these are: founder effect and bottleneck effect. The founder effect is when subpopulation caused by migration of a subset of individuals form a larger population. On the other hand, the bottleneck effect is when a subpopulation caused by a disaster leaves behind subset of individuals whom later form a larger population. The next force of evolution is flow, which is when alleles are introduced through interbreeding. Lastly, the fourth force of evolution, often spoken about, is natural selection, which is when alleles that improve fitness become more common.In this lab students used a computer simulation of their choice to investigate one of the forces of evolution. Students investigated the mutation an animal has when in comes to living in a certain environment. Lab #2 required us to understand Darwin’s Theory of natural selection by using the PhET Interactive Simulation of the University of Colorado Boulder. In this simulation

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