Mechanisms of Evolution

Flashcard
•
Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the bottleneck effect in evolution?
Back
The bottleneck effect is a sharp reduction in the size of a population due to environmental events or human activities, leading to a loss of genetic diversity.
2.
FLASHCARD QUESTION
Front
Give an example of the bottleneck effect.
Back
An example of the bottleneck effect is when Bald Eagles were hunted to near extinction, resulting in a reduced population that later recovered.
3.
FLASHCARD QUESTION
Front
What is genetic drift?
Back
Genetic drift is the change in the allele frequency of a population due to random chance events.
4.
FLASHCARD QUESTION
Front
How does genetic drift differ from natural selection?
Back
Genetic drift is driven by random chance, while natural selection is a process where individuals with advantageous traits are more likely to survive and reproduce.
5.
FLASHCARD QUESTION
Front
What role does natural selection play in introducing new alleles into a population?
Back
Natural selection does not introduce new alleles; it acts on existing alleles by favoring those that confer a survival advantage.
6.
FLASHCARD QUESTION
Front
What is gene flow in the context of evolution?
Back
Gene flow is the transfer of genetic material between populations, which can introduce new alleles into a population's gene pool.
7.
FLASHCARD QUESTION
Front
How can gene flow affect genetic diversity?
Back
Gene flow can increase genetic diversity by introducing new alleles from other populations.
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