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EVOLUTION

Concept 1 & 2 Vocabulary

TermDefinition
Evolution The process of biological change in populations over time that makes descendants genetically different from their ancestors.
Microevolution Evolution can occur on a small scale affecting a single population
Macroevolution Evolution on a large scale affecting changes in species across populations
Natural Selection organisms with the "best" traits (adaptations) will live longer & reproduce more than others, causing changes in the population over time by acting on traits that are heritable.
Fitness a measure of how well you can survive in your environment
Adaptation a feature that allows an organism to better survive in its environment
Gene Pool the combined alleles of all individuals in a population
Genetic drift random change in the frequency of alleles in a population over time
Gene Flow The movement of genes into/out of a population. Occurs during migration. Results in an increase in genetic variation in the population.
Sexual selection (Non-random mating) The selection of traits that aren't necessarily good for survival fitness, but without them, you can't pass on your genes at all because you can't reproduce.
Genetic equilibrium (Hardy-Weinberg equilibrium) When there are no changes in the allele frequencies in a population over time.
Species Group of organisms that can successfully interbreed and produce viable, fertile offspring
Adaptive Radiation a type of divergent evolution occurring on a small scale over a shorter period of time
Created by: Mrs.Coons
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