Evolution - Gradual change in a species over time, Microevolution - Change in the frequency of alleles in a gene pool over time, Macroevolution - Change in traits in a species over time that lead to speciation, Gene Pool - All of the alleles in an interbreeding population, Allele - Variations of the same gene, Gene Flow - Migration of alleles between gene pools/populations, Natural Selection - Increased fitneOrganisms that are better adapted to their environment are more likely to survive and pass on their alleles, Mutation - Permanent change to the base pair sequence of a gene that makes a new allele, Sexual Selection - Non random mate selection that leads to a change in allele frequency, Drift - Random loss or fixation of an allele more likely to happen in a small population, Bottleneck - Loss of alleles in a population due to a sudden large near extinction event, Founders Event - Loss of alleles in a subpopulation that migrates to a new location, Disruptive Selection - Middle phenotype is selected against and two extreme phenotypes are selected for, Stabilizing Selection - Two extreme phenotypes are selected against and the middle phenotype is selected for, Directional Selection - One extreme phenotype is selected for, Selection Pressure - Any factor in the environment that affects an organism's ability to survive, Fitness - How well adapted an organism is for survival in its habitat,

13 Bio - Evolution Processes

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