Biology Notes

Biology Notes - share a common gene pool • Gene Pool o...

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Biology Notes April 9, 2009 Population Genetics and Microevolution Hardy-Weinberg Equation Departures from Hardy-Weinberg Equilibrium Stabilizing, directional, and disruptive selection Evolution is a process of adaptation to the environment. Natural selection acting on variation (preserving if beneficial, removing if detrimental) is the means by which this adaptation occurs. -Darwin Scales of evolution Microevolution o Small-scale, short-term, below the species level changes in populations; result of a change in allele frequency Macroevolution o Long-term, large-scale changes above the species level Definitions Population- o All the individuals of the same species at a particular area at the same time.
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Unformatted text preview: share a common gene pool • Gene Pool o Sum of all alleles of all genes (add up to 1) When frequency is stable- genetic equilibrium Frequency change- evolution Hardy-Weinberg Equation • P^2 + 2pq + q^2= 1 o Predicts populations that are in genetic equilibrium o Describes an idealized population that is not evolving o That is, under certain conditions populations allele frequencies are in genetic equilibrium The 5 Conditions Necessary for H-W Genetic Equilibrium • No mutations • No migration (i.e. no gene flow) • Large population size (i.e. no genetic drift) • Random Mating • No Natural Selection...
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This note was uploaded on 10/08/2010 for the course BIO 380 taught by Professor Martin during the Spring '10 term at Rutgers.

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