Human Heredity 11th Edition by Michael Cummings

Exercise 26

Ecogenetics is a branch of genetics that deals with the genetic variation that underlies reactive differences to drugs, chemicals in food, occupational exposure, industrial pollution, and other substances. Cases have arisen in which workers claim that exposure to a certain agent has made them feel ill, whereas other workers are unaffected. Although claims like these are not always justified, what are some concrete examples that prove that variation in reactions to certain substances exist in the human population