Essential Genetics 6th Edition by Daniel Hartl

Exercise 15

In an experimental population of the flour beetle Tribolium castaneum , the pupal weight is distributed normally with a mean of 2.0 mg and a standard deviation of 0.2 mg. What proportion of the population is expected to have a pupal weight between 1.8 and 2.2 mg? Between 1.6 and 2.4 mg? Would you expect to find an occasional pupa weighing 3.0 mg or more? Explain your answer.