Genetic Drift vs Gene Flow Lesson

• gene flow

• natural selection

• bottleneck effect

• founder effect

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A bee carrying pollen from one flower population to another flower population.

• gene flow

• natural selection

• bottleneck effect

• founder effect

Which of the following statements about gene flow is TRUE?

• Gene flow is a result of individuals that breed in an old location

• Gene flow is a result of migrating individuals that breed in a new location

• Gene flow is not a result of migrating individuals that breed in a new location

• None of the statements are true

How do evolution directly affected by the gene flow?

• It doesn’t contribute to evolution

• It introduces new alleles into a population.

• It reduces the number of members in a population.

• It changes the environment in which a population resides.

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In order for the genetic drift to occur, what is the necessary parameter?

• The population must be large.

• The population must be small.

• The population must be under environmental stress.

• The population must be sterile.

Someone steps on some bugs and randomly removes their alleles from the population. This is an example of

• gene flow

• genetic drift

• speciation

• allele frequency

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The allele frequencies of the mouse population in the picture are changing over time. Which is true?

• The population is evolving.

• The population is not evolving.

• The population will go extinct.

• The population's genetic variation is increasing.

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Which of the following best describes genetic drift?

• A random change in allele frequencies in a population

• The movement of alleles between populations

• The adaptation of organisms to their environment

• The selective breeding of organisms

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What is a key difference between genetic drift and gene flow?

• Genetic drift involves random changes, while gene flow involves migration

• Genetic drift requires large populations, while gene flow requires small populations

• Genetic drift increases genetic variation, while gene flow decreases it

• Genetic drift is a result of natural selection, while gene flow is not

In a small population of rabbits, a sudden flood randomly kills a large portion of the population. This is an example of:

• Gene flow

• Genetic drift

• Natural selection

• Mutation

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