BI111 Chapter Notes - Chapter 17: Null Model, Gene Flow, Ploidy
Document Summary
Microevolution = a heritable change in the genetics of a population. Polymorphism = the existence of discrete variations of a characteristic. Quantitative variation = individuals differ in small, incremental ways. Qualitative variation = characteristics that exist in two or more discrete states and intermediate forms are often absent. Gene pool = the sum of all alleles at all gene loci in all individuals. Genotype frequency = the percentages of individuals possessing each genotype. Allele frequency = the relative abundance of the different alleles. Null model = to predict if a particular factor would have no effect. Genetic equilibrium = the point where there is no allele or genotype frequency change in succeeding generations. Neutral mutations = when there is a mutation yet nothing occurs, a silent mutation. Gene flow = when genes move from one population to another generating diversity through immigration and emigration, introduces genetic variation.
