Microevolution

CHAPTER 23 THE EVOLUTION OF POPULATIONS OUTLINE I. Population Genetics A. The modern evolutionary synthesis integrated Darwinian selection and Mendelian inheritance B. The genetic structure of a population is defined by its allele and genotype frequencies C. The Hardy-Weinberg theorem describes a nonevolving population II. Causes of Microevolution A. Microevolution is a generation-to-generation change in a population's allele or genotype frequencies B. The five causes of microevolution are genetic drift, gene flow, mutation, nonrandom mating, and natural selection III. Genetic Variation, the Substrate for Natural Selection A. Genetic variation occurs within and between populations B. Mutation and sexual recombination generate genetic variation