ANTH 160 Study Guide - Quiz Guide: Melanism, Heritability, Baby Talk
Document Summary
It operates on existing heritable variation in the population, favoring expressions of traits that are most suitable for the environmental conditions. It leads to differential survival of individuals in the population, with those possessing favorable traits surviving in higher numbers than those without favorable traits. It leads to differential reproduction of individuals in the population, with those possessing favorable traits leaving more descendents in future generations than those without favorable traits. Possession a trait must lead to an individual being better adapted to all aspects of the environment. Possessing a trait must lead to differential survival and/or differential reproduction. Predation rates birds prey upon the moths that are visible, thus those that are better camouflaged survive and reproduce at higher rates. Interaction between the pollution and fertility those that are melanistic are more resistant to the effects of pollution, and thus survive and reproduce at higher rates.
