In the case of the peppered moth (Biston betularia), the black color form became dominant over the light color form in England during the industrial revolution.
What was rare in 1848 became common for the next fifty years. By 1900, peppered moth populations in areas around English cities were up to 98% dark moths. Scientists were curious as to why this was happening. Scientists have discovered the specific mutation that caused moths to turn black during the Industrial Revolution. In an iconic evolutionary case study, a black form of the peppered moth quickly took over industrial areas of the UK during the 19th century, when soot blackened the tree trunks and walls of its habitat. have salt and pepper coloring. But as the years passed, black versions of the moth began to prevail. These days, dark variants are the most common, and geneticists have long speculated that the Industrial Revolution is to blame. . The frequency of dark-colored moths increased at this time, an example of industrial melanism.
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