Biology lab Essay

1805 Words Apr 23rd, 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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Discuss/Explain, “in details.” The concept of gene pool and gene frequency of a population.
Gene pool is the total number of genes of every individual in an interbreeding population ("Gene pool," 2008). A large gene pool indicates high genetic diversity, increased chances of biological fitness, and survival ("Gene pool," 2008). A small gene pool indicates low genetic diversity, reduced chances of acquiring biological fitness, and increased possibility of extinction ("Gene pool," 2008). Gene pool increases when mutation occurs and survives. Gene pool decreases when the population size is significantly reduced (e.g. famine, genetic disease, etc.) ("Gene pool," 2008). Some of the consequences when gene pool is small are low fertility, and increased probability of acquiring genetic diseases and deformities ("Gene pool," 2008). Gene pool gives an idea of the number of genes, the variety of genes and the type of genes existing in a population ("Gene pool," 2008). It can be used to help determine gene frequencies or the ratio between different types of genes in a population ("Gene pool," 2008).
Allele frequency is a measure of the relative frequency of an allele on a genetic locus in a population; which is usually it is expressed as a proportion or a percentage ("Allele frequency," 2014). In population genetics, allele frequencies show the genetic diversity of a species population or equivalently the richness of its gene pool ("Allele frequency," 2014). The frequencies

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