Hardy Weinberg Equilibrium And Natural Selection Lab Essay

1241 Words Sep 11th, 2016 5 Pages
Hardy-Weinberg Equilibrium and Natural Selection Lab
Introduction
In this lab we were able to experiment to better understand the concepts of Hardy-Weinberg Equilibrium and Natural Selection. The theory of Evolution states that populations that are evolving will have allele and genotype frequencies that change from generation to generation. To evaluate whether a population is evolving, the Hardy-Weinberg equation is used. A population is in Hardy-Weinberg equilibrium if there is no change in the allele and genotype frequencies from generation to generation. The five conditions that must be met for a population to be in Hardy-Weinberg equilibrium include: no mutations, random mating, no natural selection, extremely large population size, and no gene flow. If one or more of these conditions are not met, then evolutionary change will occur. In nature, the Hardy-Weinberg equilibrium conditions are rarely met. The Hardy-Weinberg equation for a gene with two alleles is p2+2pq+q2=1 where p is the frequency of a dominant allele and q is the frequency of the recessive allele. The most common mechanisms of evolutionary change include natural selection, genetic drift, and gene flow. All of these mechanisms result in an alteration of allele and genotype frequency. If an organism possesses heritable traits that are better suited to the environment where it lives, it is likely to produce more offspring than those with traits that do not match their environment as well. This results in…

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