BIOL 1202 Chapter : Chapter 23 Notes With Annotations
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Remember that evolution is the change in gene frequencies in the population. --population is a localized group of individuals that belong to the same biological species. Some variation is the result of heritable changes (mutation and/or genetic recombination) and some variations is non -heritable (see fig 23. 3) Population of the same organism can show variations. The variation between populations can be discrete or continual. Frequently continual variation in a population will exist as a cline (see fig 23. 5) -- cline is a graded variation in a trait that parallels a gradient in the environment. >>>>>>the integration of darwinism (evolution) and mendelism (genetics) When the field of evolution (and the study of populations) merged with genetics, the science of population genetics was formed. --population genetics is the study of how populations change genetically over time. Natural selection is the primary mechanism for evolutionary change. >>>>>>a population has a genetic structure defined by its gene pool.
