bottleneck & founder effect
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7 Terms
What is a bottleneck effect?
A population experiences a dramatic reduction in size, causing random changes in allele frequencies.
What mechanism causes the bottleneck effect?
Genetic drift
What usually happens to genetic diversity after a bottleneck?
it decreases
What is a founder effect?
A small group leaves or separates from a larger population and establishes a new population with potentially different allele frequencies.
What mechanism causes the founder effect?
Genetic drift
What usually happens to genetic diversity in a founder population?
It is often reduced because only a small sample of the original gene pool is represented.
What happens to genetic drift when population size decreases?
Genetic drift becomes stronger.