Other Mechanisms of Evolution

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Presentation transcript:

Other Mechanisms of Evolution

GENE POOL All alleles that are present in a population. In genetic terms, evolution is any change in the relative frequency of alleles in a population.

GENE FLOW The movement of alleles in (immigration) and out (emigration) of a population.

GENETIC DRIFT A random change in allele frequency in a population.

FOUNDER EFFECT Change in allele frequencies as a result of the migration of a small subgroup of a population. Ex: Ellis-van Creveld syndrome in the Amish.

http://www.youtube.com/watch?v=W-WumllRPLI http://www.youtube.com/watch?v=Q6JEA2olNts http://www.youtube.com/watch?v=WhFKPaRnTdQ http://highered.mheducation.com/sites/dl/free/0072835125/126997/animation45.html