lecture05 - II. The four main forces of evolution A. Change...

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BioNB 2210: Lecture 05 Sept. 2, 2011 Lecture 05: Forces of Evolution Professor Kerry Shaw Required reading for today Zuk, M., Rotenberry, J. T., & Tinghitella, R. M. (2006). Silent night: adaptive disappearance of a sexual signal in a parasitized population of field crickets. Biology Letters 2:521-524. Learning Objectives 1. To understand a variety of evidence showing that behavioral evolution occurs 2. To expand your understanding of the forces that can cause behaviors to evolve 3. To appreciate that evolutionary forces can oppose each other I. Evidence for behavioral evolution A. Change over time B. Descent with modification
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Unformatted text preview: II. The four main forces of evolution A. Change due to introduction of new variants 1. Mutation and recombination = appearance of new alleles or allelic combinations 2. Gene flow = introduction of new variants from elsewhere B. Change due to biased transmission of variants to next generation 1. Genetic drift = chance differences in survival and reproduction of variants 2. Natural selection = differential survival and reproduction of variants due to differential success (much attention devoted to this throughout the course) BioNB 2210: Lecture 05 Sept. 2, 2011...
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This note was uploaded on 08/27/2011 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell University (Engineering School).

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lecture05 - II. The four main forces of evolution A. Change...

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