The lecture will present both an introduction to theoretical studies, and discussion of actual molecular and phenotypic variation in natural populations and how processes such as mutation, recombination, and selection affect genetic variation. Topics discussed will include genetic variation, Hardy-Weinberg Equilibrium, genetic recombination, linkage and disequilibrium, basic natural selection models, molecular evolution and phylogenetics, mutation, genetic drift, inbreeding and nonrandom mating, population subdivision and gene flow, and the neutralist versus selectionist debate. Prerequisites: BIO 200 or 201 or consent of instructor. Offered every fall semester.