What is the bottleneck effect?
Lesson 50: Gene Flow and Genetic Drift

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Science
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The bottleneck effect occurs when there is a reduction in population size due to natural disasters, overhunting, or disease, leading to a loss of genetic diversity.
2.
FLASHCARD QUESTION
Front
How does genetic drift occur?
Back
Genetic drift occurs due to random changes in allele frequencies, which are more pronounced in small populations.
3.
FLASHCARD QUESTION
Front
What is gene flow?
Back
Gene flow is the addition or removal of alleles in a population due to individuals entering or leaving one population for another.
4.
FLASHCARD QUESTION
Front
What is the founder effect?
Back
The founder effect is a change in allele frequencies that occurs when a new population is established by a small number of individuals from a larger population.
5.
FLASHCARD QUESTION
Front
Which populations are most affected by genetic drift?
Back
Small populations are most affected by genetic drift because random events can have a larger impact on their allele frequencies.
6.
FLASHCARD QUESTION
Front
What can cause a bottleneck effect?
Back
Natural disasters, disease, overhunting, and habitat destruction can all cause a bottleneck effect.
7.
FLASHCARD QUESTION
Front
What is an example of gene flow?
Back
An example of gene flow is when a group of birds migrates to a new area and interbreeds with the local population, introducing new alleles.
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