Chapter+23+Active+Reading+Guide

** // __Big Ideas of the Chapter:__ // ** What truly fuels evolution? Why is genetic variation so important? Are there any situations in which evolution will not occur? What are the different types of Natural Selection?
 * The Evolution of Populations (Ch. 23) **

Do individual organisms evolve? Explain. Compare and contrast discreet with quantitative characteristics. ** __Geographic Variation__ ** - ** __Mutation__ ** - How does sexual reproduction affect evolution? ** __Population__ ** - ** __Gene Pool__ ** - What is the ** __Hardy-Weinberg Equalibrium__ **? How can this be used to study evolution? Write and translate the formula. How does natural selection alter gene frequencies? ** __Genetic Drift__ ** - ** __Founder Effect__ ** - ** __Bottleneck Effect__ ** - List and summarize the four key points of Genetic Drift. ** __Gene Flow__ ** - What does gene flow do to allele frequencies between populations? ** __Relative Fitness__ ** - Describe the 3 types of natural selection? Draw what the gene frequency graphs for each type of selection. ** __Directional Selection__ __Disruptive Selection__ __Stabilizing Selection__ ** ** __Sexual Selection__ ** - ** __Sexual Dimorphism__ ** - Compare and contrast ** __Intrasexual Selection__ ** with ** __Intersexual Selection__ **. Use examples in your explanations.

Explain how the situations listed below help to ** // maintain genetic variation // **. Diploidy -

Heterozygote Advanatage -

Frequency Dependent Selection -

Neutral Variation -

Why can’t natural selection create “perfect” organisms?