Mechanisms of Evolution: Population Selection and Change

Overview of this Section ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Populations, Gene Pools, and Species ,[object Object],[object Object],[object Object],[object Object]

Counterexample: Related Animals whose Offspring are Sterile ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Related Animals That Can But Do Not Interbreed in the Wild ,[object Object],[object Object],[object Object],[object Object]

Sources of Variation in Species: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Mutations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chromosomal Mutation ,[object Object],[object Object],[object Object],[object Object]

Mutations as “Errors” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mutations as “Necessary Errors” ,[object Object],[object Object],[object Object],[object Object]

Sources of Variation in Gene Pools ,[object Object],[object Object],[object Object],[object Object]

Natural Selection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example: Drought on Gal á pagos Islands: 1977 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example: Galapagos 2003-2004 Drought ,[object Object],[object Object],[object Object],[object Object],[object Object]

Types of Natural Selection: Direction and Stability ,[object Object],[object Object],[object Object],[object Object]

Natural Selection and Sickle Cell Anemia ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sexual Selection: ,[object Object],[object Object],[object Object],[object Object]

Kin Selection ,[object Object],[object Object],[object Object],[object Object]

Gene Flow ,[object Object],[object Object],[object Object],[object Object]

Sources of Gene Flow ,[object Object],[object Object],[object Object],[object Object]

Mating as a Factor of Gene Flow ,[object Object],[object Object],[object Object],[object Object],[object Object]

Marriage Promotes Gene Flow ,[object Object],[object Object],[object Object]

Genetic Drift ,[object Object],[object Object],[object Object]

Genetic Drift: Statistical Concepts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Genetic Drift: Founder Effect ,[object Object],[object Object],[object Object],[object Object],[object Object]

Genetic Drift: Bottleneck Effect ,[object Object],[object Object],[object Object],[object Object],[object Object]

Other Evolutionary Processes: Genetic Drift 4 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary and Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Mechanisms of Evolution: Population Selection and Change

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Mechanisms of Evolution: Population Selection and Change