Genetic Drift and Fixation

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What is the term for when an allele frequency reaches 100% in a population?

Genetic drift

Bottleneck effect

Natural selection

Fixation (correct)

What is the main difference between genetic drift and natural selection?

Genetic drift only occurs in small populations, while natural selection only occurs in large populations

Genetic drift acts on small populations, while natural selection acts on large populations

Genetic drift considers the benefits of an allele, while natural selection does not

Genetic drift does not consider the benefits of an allele, while natural selection does (correct)

What is the term for the reduction in genetic diversity that occurs when a population is severely reduced in size?

Founder effect

Natural selection

Genetic drift

Bottleneck effect (correct)

What is the result of a population experiencing a bottleneck effect?

A decrease in genetic diversity Signup and view all the answers

What is the term for when a small group of individuals becomes isolated from a larger population and establishes a new population?

Founder effect Signup and view all the answers

What is the effect of a small population size on the rate of genetic drift?

It increases the rate of genetic drift Signup and view all the answers

What is the primary difference between the founder effect and the bottleneck effect?

The mechanism of colonization vs. catastrophe Signup and view all the answers

What is the outcome of genetic drift in a population?

Random change in allele frequencies Signup and view all the answers

What occurs when a small group of individuals breaks off from a larger population to establish a colony?

The founder effect Signup and view all the answers

What is the result of genetic drift on a population's genetic diversity?

Decreased diversity Signup and view all the answers

What is the term for the loss of genetic variation in a population due to a severe reduction in population size?

Bottleneck effect Signup and view all the answers

What is the primary mechanism by which natural selection acts on a population?

Variation in traits and fitness Signup and view all the answers

Which of the following is an example of the founder effect?

A small group of individuals establishing a new population Signup and view all the answers

What is the difference between genetic drift and natural selection?

Genetic drift is random, while natural selection is non-random Signup and view all the answers

What is the key difference between genetic drift and natural selection?

Genetic drift is random, while natural selection is directional Signup and view all the answers

How does genetic drift affect genetic diversity in a population?

It decreases genetic diversity Signup and view all the answers

What is the result of a bottleneck effect on a population's genetic diversity?

Decreased genetic diversity Signup and view all the answers

What is the term for the phenomenon where a single allele becomes fixed in a population?

Fixation Signup and view all the answers

Genetic Drift and Fixation

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