Question

1) The DF508 allele, which causes cystic fibrosis in homozygotes, occurs at a frequency (0.02) in European populations that exceeds the background mutation rate in humans. This suggests that what process might be maintaining this relatively high allele frequency?

Select one:

a. Mutation

b. Drift

c. Selection

d. None of the above

2)

Which of the following could be used to differentiate two populations?

Select one:

a. Geography

b. Allele frequencies

c. Barriers to dispersal

d. All of the above

3) Migration between populations tends to ______ allele frequencies.

Select one:

a. homogenize / make the same

b. differentiate / make different

4) Given enough time, drift alone will tend to do what to genetic diversity in a population?

Select one:

a. Increase

b. Decrease

c. Maintain

5)

Which of the following processes will be intensified in small populations (i.e., will change allele frequencies in fewer generations)?

Select one:

a. Genetic drift

b. Selection

c. Migration

d. All of the above