lecture 13 - Lecture 13 Goals of microevolution o...

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Lecture 13 Goals of microevolution o Understanding process of evolutionary change in populations o How processes account for the amount and distribution of genetic variation within and among populations o How does divergence among populations contribute to origin of diversity at higher taxonomic levels Natural selection is not active o Produces imperfection in design Ex) recurrent laryngeal nerve in giraffe o Only one of several processes are active in changing allele frequencies o Conditions that must be met for natural selection to occur Individuals must vary in a consistent way in survival, mating ability, and or fertility so that some leave more offspring than others Must vary in some characters that underlie performance Must be a genetic basis for variation Phenotypes must at least be partially heritable so that successful variants pass on more alleles OVERALL – frequency of successful variants must increase in the next generation Candace Galen Experiment – alpine skypilot flower and bees
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This note was uploaded on 03/31/2008 for the course BIOEE 2780 taught by Professor Geber during the Fall '07 term at Cornell University (Engineering School).

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lecture 13 - Lecture 13 Goals of microevolution o...

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