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Mutation as a Random Source of Variation
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AP Biology
APB.362 Mutation as a Random Source of Variation
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A model of a desert mouse population includes these possible causal sequences. Which sequence best explains how a new fur-color allele could arise and later become common?
A
Predators prefer lighter mice; the population intentionally mutates toward darker fur; all offspring inherit the planned allele.
B
Selection identifies the best fur color; mutation then changes only the DNA of mice that survived predation.
C
Random DNA mutation in a germline cell creates the allele; offspring inherit it; selection may favor its phenotype in the desert environment.
D
Drift changes fur color in adult mice; the acquired color then becomes a new allele in gametes.
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