“Evolutionary history of a species” Determined through fossils, homologous structures, morphology, & molecular biology Taxonomy: classification of organisms; organisms are classified into categories called taxa Hierarchical Classification Each taxon more inclusive...
Species Concept Biological species concept: species is a group of populations that can breed and produce viable offspring Defined by reproductive isolation and gene flow; basis for understanding macroevo. Morphological species concept: distinguishes a species by body...
When the allele frequencies in a population remain constant from generation to generation, the population is said to be in genetic equilibrium or Hardy-Weinberg Equilibrium At genetic equilibrium, there is no evolution But allele representation in generations might...
Genetic Variation: difference in DNA bases or sequences Genetic variation enables evolutionary responses to environmental change Evidence of genetic variation: diff genotypes or phenotypes Natural selection acts on variation among individuals in the population and...
Process in which individuals with certain inherited characteristics are more likely to survive in an environment, reproduce and pass on those traits → traits have selective advantage Environment is the main force behind natural selection → controls which traits are...
Review Basic idea: “Descent with modification, change in genetic composition over time from generation to generation” Specific: the process by which frequency of heritable traits in population changes from one generation to the next A population is evolving if their...