AP Biology 2007-2008 Evolutionary Forces What changes populations?
Geographic Isolation How about taking a swim in this gene pool??
IT’S ALL GENETIC…. Get my drift? Founder effect When a new population is started by only a few individuals some rare alleles may be at high frequency;
AP Biology Evolution Unit What is Evolution? Change in the genetic makeup of a population over time. Fitness – those with favorable variations for survival.
Forces of evolutionary change Natural selection – traits that improve survival or reproduction accumulate in the population ADAPTIVE change (survival.
Mechanisms for Evolution
