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Microevolution Flashcards

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6223662215PopulationA group of organisms of the same species living in the same area at the same time, and which are capable of interbreeding.0
6223662216Gene PoolConsists of all genes, including all the different alleles, that are present in a population.1
6223662217Allele Frequencythe number of times an allele occurs in a gene pool, compared to the total number of alleles in that pool for the same gene2
6223662218Natural SelectionProcess by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest3
6223662219AdaptationA characteristic that improves an individual's ability to survive and reproduce in a particular environment.4
6223662220Acquired Traitscharacteristics that develop as an organism interacts with its environment; result from learning - not genetics5
6223662221Genetic Traitscharacteristics or traits acquired from our parents6
6223662222Directional SelectionForm of natural selection in which the entire curve moves; occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve7
6223662223Adaptive RadiationPeriod of evolutionary change in which groups of organisms form many new species whose adaptations allow them to fill different ecological roles in their communities.8
6223662224Stabilizing SelectionNatural selection that favors intermediate variants by acting against extreme phenotypes9
6223662225Artificial SelectionSelection by humans for breeding of useful traits from the natural variation among different organisms10
6223662226Gene FlowGene flow introduces new genes into a population and also acts to make populations more similar genetically to one another11
6223662227Genetic DriftA change in the gene pool of a population due to chance.12
6223662228Bottleneck EffectGenetic drift that occurs when the size of a population is reduced, as by a natural disaster or human actions. Typically, the surviving population is no longer genetically representative of the original population.13
6223662229Founder EffectGenetic drift that occurs when a few individuals become isolated from a larger population and form a new population whose gene pool composition is not reflective of that of the original population.14
6223662230Convergent EvolutionProcess by which unrelated organisms independently evolve similarities when adapting to similar environments15
6223662231Divergent Evolutionwhen two or more species sharing a common ancestor become more different over time16
6223662232CoevolutionProcess by which two species evolve in response to changes in each other over time17
6223662233MutationA random change in DNA18
6223662234Hardy-Weinberg EquilibriumHow often an allele appears, used to measure genetic variation in a population. Five conditions must be met.19
6223662235pRepresents the the dominant allele20
6223662236qRepresents the recessive allele21
62236622372pqRepresents the heterozygous genotype22

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