BI111 Study Guide - Final Guide: Cladogenesis, Zygote, Magnesium
Document Summary
Microevolution: heritable variation in generation of a population- ex: antibiotic resistance. Population: all individuals of single species that live together at same time and place. Phenotypic variation: heritable variation in appearance and/or function. Phenotypic plasticity: ability of an organism to change phenotype due to the environment. Quantitative variation: characteristics with a range of variation. Individual differences in small, incremental ways, such as changes in height, controlled by multiple genes. Qualitative variation: characteristics with two or more distinct states, ex- black or white feathers. Genes and environment: phenotypic variation due to genetics, environmental differences or both. Only genetic variation is subject to evolutionary change. Genetic variation: genetic variation due to production of new alleles (mutations) and recombination of the existing ones (crossing over, independent assortment, etc) Gene pool: the sum of all alleles at all loci in all individuals of a population. Genotype frequency: percentages of individuals possessing each genotype. Allele frequency: calculated from genotype in diploid organisms.
