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1323441488_CHAPTER_16_SPR

1323441488_CHAPTER_16_SPR - EVOLUTION/LECTURE1...

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EVOLUTION/LECTURE1 file:///E|/CH16-SPECIATION-SPRING-2008/CHAPTER%2016_SPR_2008.HTML[12/8/2011 2:57:06 PM] Evolution ( PCB 4674 ). Chapter 16. Mechanisms of speciation Main topics of lecture: I: Species concepts: 1.- What is a species? 2.- Biological species concept 3.- The phylogenetic species concept 4.- The morphospecies concept 5.- Applying species concept II: Mechanisms of isolation: 6.- Physical isolation 7.- Changes in chromosomes as a barrier to gene flow III: Mechanisms of divergence: 8.- Genetic drift 9.- Natural selection 10.- Sexual selection IV: Secondary contact: 11.- Reinforcement of parental forms 12.- Hybridization, creation of new species, and hybrid zones V: The genetics of differentiation and isolation: 13.- Classical genetics 14.- Analyzing quantitative trait loci I: Species concepts: 1.- What is a species? 1.1.- In previous chapters we investigated how mutation, natural selection, migration and drift act to change allele frequencies within populations; now we ask how these four forces can lead to genetic differences between populations. In addition for providing foundation for studying the history of life, studying speciation has important practical applications.
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