Microevolution Review SW

A drastic reduction in the size of a population that can change allele frequencies is called

• the bottleneck effect

• the founder effect

• the gene flow effect

• the Thanos effect

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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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Small populations are more prone to genetic drift than large populations.

• True

• False

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Dog breeding is an example of

• natural selection

• genetic drift

• speciation

• artificial selection

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Adaptations are features you are born with that either help you or hurt you in your environment.

• True

• False

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A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:

• the green population to increase and the yellow to decrease

• both populations should stay the same

• both populations will increase

• the green population to decrease and the yellow to increaseThis is a wrong answer

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What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the organism knew it needed that trait, survives, and passes it on.

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What process is being shown in this image?

• Variation
• Natural Selection
• Selective Breeding
• Homeostasis

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A forest fire ignites in the Sam Houston State Forest and kills many members of a population of pigmy rattlesnakes.

• Gene Flow

• Genetic Drift

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