Chapter 22 Mechanisms of Evolution

Chapter 22 Mechanisms of Evolution - Chapter 22 Mechanisms...

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Chapter 22 Mechanisms of Evolution 22.1 Basic Understanding of Evolution Adaptation - both are interested in the process and characteristics of adaptations - organisms is adapted to environment when a slightly different species would survive less well Population Genetics Provide an Under-printing for Darwin’s Theory -population evolves when individuals with different genotypes survive and reproduce at different rates explains: -origin/ maintenance of genetic variation -patterns/ organization of genetic variation -mechanisms that cause changes in allele Most Populations are Genetically Variable - many genetic variation for many characteristics Evolution changes can be measured by allele and genotype frequencies - Mendelian populations used to estimate allele frequencies by locally inbreeding - Frequency = proportion - Frequency of different alleles at each locus and frequency of genotype genetic structure - Polymorphic- more than one allele Genetic Structure doesn’t change over time with certain restrictions -if an allele isn’t advantageous, its frequency remains constant - Hardy-Weinberg Equilibrium - mating is random - population is random - population size is infinite - no gene flow - no mutation - natural selection doesn’t favor a genotype
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This note was uploaded on 09/15/2009 for the course BIOE 20c taught by Professor Marinovic during the Summer '09 term at UCSC.

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Chapter 22 Mechanisms of Evolution - Chapter 22 Mechanisms...

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