Multiple Choice
Which of the following statements is true about the relationship between alcoholism and genetics?
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12. Meiosis
Genes & Alleles
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Which of the following illustrates a situation in which genes influence the environment?
A
A fish changes color to blend in with its surroundings.
B
A beaver's genes lead it to build dams, which alter the flow of rivers.
C
A plant's leaves turn yellow due to lack of sunlight.
D
A person develops a suntan after exposure to UV light.
Verified step by step guidance1
Understand the concept of gene-environment interaction: Genes can influence behaviors or traits that, in turn, modify the environment. This is different from the environment directly affecting an organism's traits.
Analyze the first option: 'A fish changes color to blend in with its surroundings.' This describes an environmental influence on the fish's phenotype, not a gene-driven change to the environment.
Evaluate the second option: 'A beaver's genes lead it to build dams, which alter the flow of rivers.' This illustrates a gene-driven behavior (dam-building) that directly modifies the environment (river flow).
Examine the third option: 'A plant's leaves turn yellow due to lack of sunlight.' This is an example of the environment affecting the plant's phenotype, not genes influencing the environment.
Review the fourth option: 'A person develops a suntan after exposure to UV light.' This is another example of the environment (UV light) affecting the phenotype, not genes modifying the environment.
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