(M3) Multiple Choice. Write the letter of the correct answer on a separate sheet of paper.

6. Which of the following is NOT a condition of Hardy-Weinberg equilibrium?
A. no mutation
B. random mating
C. no natural selection
D. migration of individuals

7. How do mutations most directly contribute to natural selection? Mutations can ________________________________________.
A. increase the variation within a population
B. increase the relative fitness within a population
C. change the base sequence of DNA within a gene
D. create new alleles that may be more suitable for a given environment

8. Which of the following occurs when migrating individuals interbreed with a new population?
A. mutation
B. gene flow
C. genetic drift
D. natural selection

9.Antibiotics kill susceptible bacteria, and those that survive possess a genetic mutation that renders them resistant to the drug. The survivors reproduce and pass on the beneficial mutation to the next generation. What type of selection is described in the given situation?
A. artificial
B. directional
C. disruptive
D. stabilizing

10. Which parameter is necessary for genetic drift to occur? Genetic drift occurs when the population is _____________________.
A. large
B. small
C. under environmental stress
D. under Hardy-Weinberg equilibrium