Essay Biology lab

1806 Words Mar 31st, 2014 8 Pages
Donnetta Tatum
Biology 2112- The Hardy Weinberg Equilibrium Lab #3
Introduction:
1. Discuss, “in details,” the importance/significance of the Hardy-Weinberg Law.
The law proves that natural selection is necessary for evolution to occur ("SparkNotes: population genetics," 2014). The conditions set up by the Hardy-Weinberg Law allow for variability (the existence of different alleles) and inheritance, but they eliminate natural selection ("SparkNotes: population genetics," 2014). The fact that no evolution occurs in a population meeting these conditions proves that evolution can only occur through natural selection ("SparkNotes: population genetics," 2014). The Hardy-Weinberg Law allows us to estimate the effect of selection pressures
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Population genetics
Donnetta Tatum studies the different "forces" that might lead to changes in the distribution and frequencies of alleles in relations to evolution ("Allele frequency," 2014).

6. Discuss/Explain, “in details,” the concept of the genetic drift of a population.
The process of change in the genetic composition of a population due to chance or random events rather than by natural selection, resulting in changes in allele frequencies over time ("Genetic drift," 2008). The effect of genetic drift in large populations is usually negligible whereas in small populations, it predominates ("Genetic drift," 2008). In a small population, genetic drift results in some alleles become more common while others become less common over time ("Genetic drift," 2008).

7. Discuss/Explain, “in details,” the significance/importance of the Hardy-Weinberg in the evaluation of evolution (change) in a given population over a period of time.
Evolution is not only the development of new species from older ones, as most people assume (O, 1997-2012). It is also the minor changes within a species from generation to generation over long periods of time that can result in the gradual transition to new species (O, 1997-2012). Hardy-Weinberg theorem gives a baseline by which to judge whether evolution has occurred. There are 5 agents of evolutionary change ("Lecture 7: Population ecology 1," 2008):
1. Mutation - new alleles form because of

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