chapter 11

chapter 11 - Chapter 11 Population Genetics(Microevolution...

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Chapter 11 Population Genetics (Microevolution) 1) Evolution: a change in the allele frequency of a population over time 2) Population: all members of some species in the same place at the same time (potentially capable of interbreeding) 3) Gene Pool: total number of alleles in the population 4) Hardy-Weinberg a) Equilibrium population i) If no change in allele frequency/ stable population, then no evolution occurs ii) If there is a change in allele frequency, then the population has evolved b) Industrial Melanism: pollution c) Factors (agents/ reasons) for a change in allele frequency i) Mutation: random chance change in alleles ii) Gene Flow (migration): one individual leaves a population to join a new population (breeds) iii) Genetic Drift: change in allele frequency due to random chance (1) Bottleneck Effect: population greatly reduced in size; few chance survivors breed to produce all new offspring iv) Non-random Mating (sexual selection): based on phenotype v) Natural Selection: based on phenotype of individual (best combination of genes are
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This note was uploaded on 07/07/2008 for the course BIOL 115 taught by Professor Behrens during the Spring '07 term at Towson.

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