Bottleneck

A drastic reduction in the size of a population that can change allele frequencies is called

• the bottleneck effect

• the founder effect

• the gene flow effect

• the Thanos effect

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This occurs when a large population is drastically reduced by an event such as a natural disaster; the population's new gene pool only contains alleles from the survivors

• Founder effect

• Bottleneck effect

• Meteor effect

• Natural selection

Northern elephant seals have reduced genetic variation because of humans hunting them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century.

• Gene flow

• natural selection

• bottleneck effect

• founder effect.

• gene flow

• natural selection

• bottleneck effect

• founder effect

Tags

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Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small.  2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.

• gene flow

• bottleneck

• mutation

• founders

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_______________ occurs when a population declines to a very small number then goes back up but results in a permanent loss of genetic diversity in the population (example: the Cheetah population)

• coevolution

• bottleneck

• archaeopteryz

• mutation

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• gene flow

• natural selection

• bottleneck effect

• founder effect

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The _________________ _________________ occurs when there is a reduction in population due to natural disasters, over hunting or disease.

• founder effect

• gene flow

• bottleneck effect

• genetic drift

This occurs when a large population is drastically reduced by an event such as a natural disaster; the population's new gene pool only contains alleles from the survivors.

• Founder effect

• Bottleneck effect

• Meteor effect

• Natural selection

Northern elephant seals have reduced genetic variation because of humans hunting them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century.

• Gene flow

• Natural selection

• Bottleneck effect

• Founder effect

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5