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Chapter 15: Problem 6

Define genetic drift.

Short Answer

Expert verified
Genetic drift is a mechanism of evolution involving random changes in gene variants in a population. It can lead to significant changes over time, particularly in smaller populations, and is not driven by natural selection.

Step by step solution

01

Define Genetic Drift

Genetic drift is a mechanism of evolution. It refers to random fluctuations in the numbers of gene variants in a population.
02

Explain the Impact of Genetic Drift

These random changes can lead to drastic changes in populations over time, especially in smaller populations. The changes are not due to natural selection where advantageous traits become more common.
03

Provide Examples of Genetic Drift

An example of genetic drift could be the founder effect, where a small group of individuals migrates to a new location, or the bottleneck effect, where a population's size is drastically reduced by a disaster.

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Most popular questions from this chapter

What do artificial selection and natural selection have in common and how do they differ?

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Describe two scenarios in human populations, one of which accounts for a gradual cline, and one for an abrupt cline.

How does a founder effect or a population bottleneck amplify the effect of genetic drift?

How do genetic drift, nonrandom mating, and natural selection interact?
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