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WVU BIO 117 EXAM 1 QUESTIONS AND ANSWERS 100% CORRECT!!!!

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Fitness - ANSWER reproductive success 3 types of selection - ANSWER directional stabilizing disruptive directional selection - ANSWER trend in the bell curve representing the population that leans either to the left or right stabilizing selection - ANSWER trend in the bell curve representing the population that concentrates near the median disruptive selection - ANSWER trend in the bell curve representing a population that goes BOTH left and right, leaving those in the middle at a decreased percentage selection pressures - ANSWER a change within the environment/habitat of a population that could alter the fitness of a certain type of individual. ex. forest fire blackens an area, making dark mice have greater fitness due to their camoflauge artificial selection - ANSWER the environment is not the driving force, rather selective breeding from humans ex, cows, vegetables, etc gene flow - ANSWER immigration and emigration causes allele frequencies in the two populations to be more alike immigration - ANSWER coming in to a population emigration - ANSWER leaving a population nonrandom mating - ANSWER the avoidance of inbreeding in order to avoid the rare, harmful alleles in a population that become more frequent with inbreeding mutation - ANSWER has ability

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WVU BIO 117 EXAM 1 QUESTIONS AND
ANSWERS 100% CORRECT!!!!

, evolution - ANSWER a change in a population over time

natural selection - ANSWER traits within a population vary, and some individuals leave
more offspring than others
based on Fitness and selection pressure

Five Mechanisms of evolutionary change - ANSWER natural selection
gene flow
nonrandom mating
genetic drift
mutation

Fitness - ANSWER reproductive success

3 types of selection - ANSWER directional
stabilizing
disruptive

directional selection - ANSWER trend in the bell curve representing the population that
leans either to the left or right

stabilizing selection - ANSWER trend in the bell curve representing the population that
concentrates near the median

disruptive selection - ANSWER trend in the bell curve representing a population that
goes BOTH left and right, leaving those in the middle at a decreased percentage

selection pressures - ANSWER a change within the environment/habitat of a population
that could alter the fitness of a certain type of individual. ex. forest fire blackens an area,
making dark mice have greater fitness due to their camoflauge

artificial selection - ANSWER the environment is not the driving force, rather selective
breeding from humans ex, cows, vegetables, etc

gene flow - ANSWER immigration and emigration
causes allele frequencies in the two populations to be more alike

immigration - ANSWER coming in to a population

emigration - ANSWER leaving a population

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