Genetic Drift Concept Quiz PDF

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These are some answers to quizzes Professor True posted...

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 Which of the following statements about both natural selection and genetic drift is false? Selected Answer:

Both processes involve the differential survival of individuals

Answers:

A.

C.

Both processes involve a random component B.

Both processes are causes of evolution C.

Both processes involve the differential survival of individuals D.

Both processes are determined by fitness E.

None of the above

Question 2



1 out of 1 points

How does population size influence the degree of genetic drift which the population experiences? Selected Answer: Answers:

D.

In small populations there is an increased chance of random changes in allele frequency due to sampling errors from one generation to the next A.

Large populations are more susceptible to drift because the presence of many individuals makes it more likely that random traits will evolve in the next generation B.

Large populations are more susceptible to drift because there is more overall genetic variation, which can cause some genes to pair up in a deleterious manner C.

Small populations have higher mutation rates and are thus less susceptible to genetic drift because of their higher genetic variability D.

In small populations there is an increased chance of random changes in allele frequency due to sampling errors from one generation to the next E.

There is not a significant relationship between population size and genetic drift

Question 3



1 out of 1 points

Which of the following statements is not true about genetic drift? Selected Answer: Answers:

D.

Deleterious alleles are more susceptible to genetic drift than neutral alleles A.

Genetic drift affects allele frequencies in populations B.

Genetic drift can cause evolution C.

Genetic drift reflects random sampling of alleles

D.

Deleterious alleles are more susceptible to genetic drift than neutral alleles E.

Genetic drift is stronger in small populations than in large populations

Question 4



1 out of 1 points

Which of the following statements is true about genetic drift? Selected Answer: Answers:

B.

Genetic drift can cause evolution A.

Genetic drift does not affect allele frequencies in populations B.

Genetic drift can cause evolution C.

Genetic drift results in adaptation D.

Deleterious alleles are more susceptible to genetic drift than neutral alleles E.

Genetic drift is stronger in large populations than in small populations



Question 5 1 out of 1 points

Which of the following statements is true?

Genetic drift can cause population evolution Answer The fitness of a genotype can be affected by s: genetic drift

Individuals evolve by adapting to environmental changes Individuals can evolve adaptations to avoid genetic drift Sorting in natural selection is a random process Genetic drift can cause population evolution



Question 6 0 out of 1 points

Which of the following is an example of genetic drift?

None of the above Answer s: A tornado kills half of the individuals in a tree population. The remaining

population has different allele frequencies that the original populations.

A wild mustard plant is selectively bred to produce nutritious and good tasting vegetables for humans to eat. In a population of frogs, females prefer to mate with males that have louder

mating calls. Therefore, loud males become more abundant. In the city, black squirrels become abundant because they have a higher survival rate than gray squirrels of the same species. None of the above

Question 7



1 out of 1 points

Which of the following is an example of genetic drift? Selected Answer: Answers:

C.

Most of the brighter red cardinals (a bird species) in a population dying by chance in a hurricane A.

Fewer bears in traps after 100 years of trapping because mother bears teach offspring to avoid traps B.

A human population that raises cattle evolving adult lactose tolerance C.

Most of the brighter red cardinals (a bird species) in a population dying by chance in a hurricane D.

Evolution of salt tolerance in a turtle living in a coastal swamp that becomes regularly flooded with sea water E.

All of the above are examples of genetic drift

Question 8



1 out of 1 points

Which of the following is an example of genetic drift? Selected Answer: Answers:

D.

An increase in the frequency of an allele due to a lawn mower cutting down 75% of the individuals of a plant population A.

Migration of individuals into a new population B.

A rapid increase in the frequency of an allele in a population because it confers resistance to a newly introduced toxic chemical in the environment C.

An increase in the frequency of an allele due to the preference of a predator D.

An increase in the frequency of an allele due to a lawn mower cutting down 75% of the individuals of a plant population E.

The increase of an allele due to the preference of females in mating

Question 9



0 out of 1 points

Which of the following is most likely to make genetic drift stronger in a population? Selected Answer:

B.

Increasing the population size

Answers:

A.

Increasing the mutation rate B.

Increasing the population size C.

Decreasing the population size D.

Changing the environment E.

Increasing the amount of inbreeding

Question 10



1 out of 1 points

Fill in the blanks: ___________ is due to ________________ acting during colonization of a distant habitat such as an island. Selected Answer: Answers:

E.

The founder effect, genetic drift A.

Stabilizing selection; genetic drift B.

Genetic drift; sexual selection C.

Disruptive selection; sexual selection D.

Population bottleneck; natural selection E.

The founder effect, genetic drift...