BIOL 1202 Chapter : Biol 1202 Chapter 23
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Remember that evolution is the change in gene frequencies in the population. --population is the 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 nonheritable (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 grades variation in a trait that parallels in a gradient in the environment. Change in character along a geographic axis, temperature and other things. Tall eared rabbets in morgan city, then short eared rabbits in lafayette. >>>>>>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. Natural selection is the primary mechanism for evolutionary change.
