AP Biology / Unit 7: Natural Selection

7.4 Population Genetics

3 practice questions

Notes

Evolution is a change in allele frequencies in a population.

  • Mutation adds new alleles.
  • Genetic drift: random changes, strongest in small populations (bottleneck, founder effect).
  • Gene flow: migration moves alleles between populations.

Practice

A storm randomly kills 90% of a population. This is:
Genetic drift has the strongest effect in:
Migration between populations tends to:

Ready for more? Take the Unit 7 test.

Previous7.3 Artificial Selection