B1510F07_L8EvolMechanisms

B1510F07_L8EvolMechanisms - Georgia Tech School of Biology...

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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 mechanisms of evolution 1. natural selection: resulting in adaptation (ie, increased fitness) 2. sexual selection: increase in fitness? 3. detecting selection: Hardy-Weinberg equilibrium and its assumptions 4. forms of selection 5. examples
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Biology 1510/1511 Georgia Tech School of Biology Fall 2006 Basic Mechanics of Evolution Excess production Populations tend to increase exponentially when most/all offspring survive to adulthood. But most populations are relatively stable in size, so mortality must be important. Genetic variation Individuals often differ significantly in survival and reproductive success. Selection The set of genes passed from one generation to the next is biased toward those carried by the more successful individuals. Natural selection is simply differential success in reproduction. Evolution As long as variation is heritable and not simply due to environmental factors, differential success in survival and reproduction will lead to changes in a population through time. Population
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B1510F07_L8EvolMechanisms - Georgia Tech School of Biology...

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