Question

4. During the industrial revolution, there were two phenotypes of a particular species of moth, dark gray and light gray. Before the industrial revolution, the population of moths consisted of 1839 dark gray moths and 121 light gray moths as dark grey moths could easily blend into trees and escape detection by predators. After the industrial revolution, the population of moths consisted of 1607 light gray moths and 523 dark gray moths as light gray moths could now easily blend into trees covered in soot produced by factories. The dark gray phenotype represents the dominant genotypes and the light gray phenotypes represents the homozygous recessive genotype. a) What is the frequency of the dominant allele BEFORE the industrial revolution? What is the frequency of the recessive allele BEFORE the industrial revolution? b) What is the frequency of the dominant allele AFTER the industrial revolution? What is the frequency of the recessive allele AFTER the industrial revolution? c) What is the mechanism of evolution affecting this population of moth?