7.3 Population Genetics
in AP Biology
Natural selection acts on individuals, but only populations evolve. Genetic variations in populations contribute to evolution.
To Think About:
What factors drive evolution? How do mutations contribute to natural selection? How does genetic drift impact population size? How does the reduction of genetic variation impact populations of the same species?
Watch: AP Daily Video Population Genetics
Answer the Following Questions:
- Mutations are ________________ changes in an organism’s DNA sequence
- What do mutations create in a population?
- What is genetic drift?
- In what size populations is genetic drift more likely to occur?
- One type of genetic drift is a bottleneck event. Describes what happens in a bottleneck event.
- Another type of genetic drift is the founder effect. Describes what could create a founder effect.
- Migration (also known as ______ _______) can introduce new ________ into a population.
- Continued migration between populations can also _______________ genetic diversity/differences between populations over time.
- The raw material of evolution is ______________________
- Fitness depends on _________________
- What would be the effect on evolution if there was no genetic variation in a population?
- What is a null hypothesis?
- What is an experimental hypothesis?
- STOP Pause the video at 4:12, what is the NULL hypothesis in the give scenario?
Supplementary Resources:
- Bozeman Science: Mr. Andersen’s “Genetic Drift” video
- Crash Course Biology: Population Genetics
- TED-ED: The Five Fingers of Evolution
- Matt Ridley Essay: The Advantage of Sex
