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SlideshowReport

Directional Selection in Peppered Moths

Description


In preindustrial England, most moths were light-colored, and a dominant allele that resulted in darker coloration was rare

In post-industrial England, pollution from coal-burning factories changed the colors of the forests

Predatory birds ate more light-colored moths in soot-darkened forests, and more dark-colored moths in clean forests

Light color is adaptive in areas of low pollution; dark color is adaptive in areas of high pollution




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