A type of genetic drift in which small groups of organisms separate from a larger population and form new small colonies.
Mechanisms of Evolution

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Biology
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12th Grade
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Medium
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1.
FLASHCARD QUESTION
Front
Back
Founder Effect
2.
FLASHCARD QUESTION
Front
The exchange of genes between two populations.
Back
Gene Flow
3.
FLASHCARD QUESTION
Front
Gene pool
Back
The total genetic information found in a population; the complete collection of all the alleles found in a population.
4.
FLASHCARD QUESTION
Front
Mechanism of evolution involving individuals moving into or out of a population, either by physically arriving or leaving, or by being born or dying.
Back
Gene flow / genetic drift
5.
FLASHCARD QUESTION
Front
Mechanism of evolution where organisms with better-adapted traits are more likely to survive and reproduce.
Back
Natural selection
6.
FLASHCARD QUESTION
Front
This is a pattern of natural selection where one extreme form of a trait is more advantageous than the average or the opposite extreme; as a result, this trait in the population tends to evolve towards that one extreme.
Back
Directional selection
7.
FLASHCARD QUESTION
Front
Pattern of natural selection where both extreme versions of a trait are more advantageous than the average.
Back
Disruptive Selection
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