GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Population can evolve, not individuals
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Natural selection only involves individuals, not populations
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Genetic changes only occur in populations
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A population’s gene pool remains the same throughout time
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Detailed explanation-1: -A single individual cannot evolve alone; evolution is the process of changing the gene frequencies within a gene pool. Five forces can cause genetic variation and evolution in a population: mutations, natural selection, genetic drift, genetic hitchhiking, and gene flow.
Detailed explanation-2: -What is the best explanation for a population being described as an evolutionary unit? Explanation: The genetic make up of populations can be measured over time.
Detailed explanation-3: -Evolution is not measured in individuals because individuals cannot undergo evolution. Evolution does not refer to changes in an individual’s traits, but rather a change in the frequency of traits present in all organisms in the population.
Detailed explanation-4: -Individual organisms don’t evolve. Populations evolve. Because individuals in a population vary, some in the population are better able to survive and reproduce given a particular set of environmental conditions.
Detailed explanation-5: -The evolution of populations is defined as the changes populations undergo when organisms change over time as predicted by Darwin’s Theory of Evolution.