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Prof. Scot Emard

Feb 20, 2025

When is genetic drift a major factor in evolution?

Some answers can be:
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9 Answers

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Ms. Juana Fadel

Feb 20, 2025

Some answers can be:When there is no selective pressureWhen there is low gene flowWhen there is a bottleneck... Show More
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Ms. Juana Fadel

Feb 20, 2025

B) when there is no selective pressureExplanation:Genetic drift refers to a chance act acting over genetic variations or alleles previously distributed evenly over a population, drastically altering the distribution. For example, if I had 100 rabbits with coats white, brown, gray and black and suddenly a disease broke that killed all my black and brown rabbits, the genetic variation allowing for brown and black coats would have disappeared. This is a chance act, as the black and brown rabbits were not intentionally affected. Also there was no selective pressure for rabbits to develop one coat color, that's why the genetic variation was distributed evenly. This is different from artificial selection, as the eradication of black and brown coats was due to a random event, we did not select the coat color like people do for artificial selection.... Show More
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Ms. Juana Fadel

Feb 20, 2025

A. when there is high selective pressure Explanation:... Show More
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M
Ms. Juana Fadel

Feb 20, 2025

When there is a lower genetic flow.Explanation:Genetic drift is a major factor of evolution when the organism population size is small. In such a population, the random change in the allele frequency that is not a response to a selective pressure can become fixed in a population. The random change in population is called genetic drift. The genetic drift is a major factor in evolution when there is lower gene flow and when there is no selective pressure and when there is a bottleneck in the environment.... Show More
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