Anth. 105 Human Species – Lab 2 ReportAmy WangMarch 12, 2018IntroductionEvolution occurs when alleles in a population change over time. New alleles arise orexisting alleles become more or less common. There are four forces of evolution that causesalleles to change with time and they are mutation, genetic drift, gene flow, and natural selection.Mutation occurs when new alleles arise through changes in DNA and it increases allele diversity.Genetic drift is a process where alleles become lost through random changes and this decreasesallele diversity. Gene flow is the exchange of alleles between populations and this increase allelediversity as well. Lastly, natural selection which is the only force of evolution that is not random,occurs when alleles that improve fitness become more common. Natural Selection is dependenton three necessary conditions: variation, heritability, and fitness. In this lab, we investigated how natural selection affects the population of bunnies byusing a computer stimulation. In the computer stimulation we changed the features to an arcticclimate, added a mutation of brown bunnies, and natural selection factor of wolves. Thesefeatures seek to favor alleles that are able to survive better. The stimulation is tested three timesto ensure better accuracy and each time the chosen features remained the same.