Genetic Drift Review

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Question 1 of 10

1. Question

Which of the following scenarios is an example of genetic drift?

A giraffe with a longer neck is able to survive and reproduce, therefore being able to pass its genes to the next generation
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A mouse has a beneficial mutation that it allows to survive, reproduce and pass its genes to the next generation.
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A forest fire killed off a large amount of a population, leaving less alleles or gene variations in the remaining population.
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A frog moves into a different population of frogs and now its genetic material is in the population of frogs in the new environment.
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Question 2 of 10

2. Question

What does the following scenario represent?

Natural selection
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Gene flow
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Bottleneck effect
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Founder effect
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Question 3 of 10

3. Question
Match the following descriptions to their correct definition.
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- A change in a species of organisms over time.
- When a series of chance events like disease, hurricanes, tornadoes, fires, earthquakes and other disastrous events cause an allele to become more or less common in a population of organisms.
- Organisms that have beneficial traits in an environment will survive, reproduce, and therefore pass their genes to the next generation.
- A change in allele frequency or how often an allele occurs after a large reduction in the size of a population.
- When a few individuals move away from the original population and live in a new area where there are no other organisms.
Evolution

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Genetic drift

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Natural selection

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Bottleneck effect

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Founder effect

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Question 4 of 10

4. Question

The following diagram is an example of

Bottleneck effect
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Founder effect
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Natural selection
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Mutation
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Question 5 of 10

5. Question

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

The bottleneck effect is when a small part of a population moves to a new area, and the founder effect is when a disastrous event causes the entire population to mutate their genes.
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The bottleneck effect is when a small part of a population move away from the original population to a new area, and the founder effect is when a disastrous event changes the allele frequency in a population of organisms.
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The founder effect is when a small part of a population move away from the original population to a new area, and the bottleneck effect is when a disastrous event changes the allele frequency in a population of organisms.
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None of the answer choices.
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Question 6 of 10

6. Question

How does genetic drift lead to evolutionary change in a population of species over time?

it causes a change in allele frequencies where all allele types increase in a population of organisms.
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it causes a change in allele frequencies where all allele types decrease in a population of organisms.
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it causes a change in allele frequencies where certain alleles become more common in a population of organisms, while other alleles decrease or disappear.
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it causes a change in allele frequencies where all allele types disappear in a population of organisms.
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Question 7 of 10

7. Question

How does the example above represent the bottleneck effect?

There are more blue bead alleles left after a disastrous event such as hurricanes, tornadoes, floods, fires….etc.
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There are more yellow bead alleles left after a disastrous event such as hurricanes, tornadoes, floods, fires….etc.
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There is an equal amount of blue and yellow bead alleles left after disastrous events such as hurricanes, tornadoes, floods, fires….etc.
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There are less blue bead alleles left after a disastrous event such as hurricanes, tornadoes, floods, fires….etc.
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Question 8 of 10

8. Question

What possible issues arise after the bottleneck and founder effect?

Since the amount of alleles are increased in the new population, non-beneficial traits are more likely to get passed down which will increase the likelihood of that population dying or having genetic mutations due to there being more genetic diversity.
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The bottleneck and founder effect have no major impact on populations of organisms.
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Since the amount of alleles are decreased in the new population, non-beneficial traits are more likely to get passed down which will increase the likelihood of that population dying or having genetic mutations due to a lack of genetic diversity.
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All organisms will evolve together creating a super species that may overtake mankind.
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Question 9 of 10

9. Question

How does the following scenario represent the founder effect?

A large part of the original population moved to a new uninhabited area and began to reproduce. Some alleles may not be present in the new population as a result.
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A small part of the original population moved to a new uninhabited area and began to reproduce. There will be fewer alleles present in the new population as a result.
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A small part of the original population moved to a new uninhabited area and began to reproduce. All alleles are more likely to be present in the new population as a result.
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None of the answer choices
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Question 10 of 10

10. Question

Put the steps of bottleneck effect in order.

answer is Correct is the Correct Answer answer is Incorrect

answer is Correct is the Correct Answer answer is Incorrect

answer is Correct is the Correct Answer answer is Incorrect

answer is Correct is the Correct Answer answer is Incorrect

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