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Chapter 21: Genes Within Populations21.1 Genes vary in natural populations. (Page 434) http://www.mhhe.com/biosci/genbio/espv2/data/evolution/004/index.html Examine the following sections: Fossils 3.87 Introduction 3.88 Geologic Strata Origin of Life 3.89 Introduction 3.90 Features of Living Things 3.91 Metabolic Pathways http://www.mhhe.com/biosci/genbio/espv2/data/evolution/002/index.html Examine the following sections: Variation 3.39 Population Variation 3.42 Sickle-cell Anemia Genetic Variation Is the Raw Material of Evolution. (Page 434) Genetic Variation in Nature. (Page 435) 21.2 Why do allele frequencies change in populations? (Page 436) http://www.mhhe.com/biosci/genbio/espv2/data/evolution/002/index.html Examine the following sections: Natural Selection 3.25 Survival of the Fittest Variation 3.43 Fitness Values Other Processes 3.45 Introduction 3.46 Hardy-Weinberg Equilibrium 3.48 Allele Frequency The Hardy-Weinberg Principle. (Page 436) Five Agents of Evolutionary Change. (Page 438) Measuring Fitness. (Page 442) Interactions Among Evolutionary Forces. (Page 443) Natural Selection Can Maintain Variation in Populations. (Page 444) 21.3 Selection can act on traits affected by many genes. (Page 446) http://www.mhhe.com/biosci/genbio/espv2/data/animals/014/index.html Examine the following sections: Adaptive Learning 6.374 Natural Selection http://www.mhhe.com/biosci/genbio/espv2/data/evolution/002/index.html Examine the following sections: Natural Selection 3.28 Operates on Whole Individual Types of Selection 3.31 Directional Selection 3.32 Stabilizing Selection 3.33 Disruptive Selection 3.34 Types of Selection Adaptation 3.62 Sexual Selection Forms of Selection. (Page 446) Selection on Color in Guppies. (Page 448) Limits to What Selection Can Accomplish. (Page 450) |