Question 1

Which of the following best describes the founder effect in a population?

Accepted Answer

A small group of individuals establishes a new population, resulting in reduced genetic diversity compared to the original population.

Question 2

Which process is most likely to increase genetic variation within a population?

Accepted Answer

Mutation

Question 3

A population of beetles is reduced from 10,000 to 50 individuals after a flood. Which evolutionary process has most likely occurred?

Accepted Answer

Bottleneck effect

Question 4

Which of the following is NOT a condition required for Hardy-Weinberg equilibrium?

Accepted Answer

Small population size

Question 5

Given the Hardy-Weinberg equation $$p^2 + 2pq$$ + $$q^2 = 1$, what does q^2$ represent?

Accepted Answer

The frequency of homozygous recessive individuals

Question 6

If a population is not in Hardy-Weinberg equilibrium, what can be inferred?

Accepted Answer

At least one of the Hardy-Weinberg conditions is not being met.

Question 7

Which type of selection favors individuals with intermediate phenotypes and reduces variation?

Accepted Answer

Stabilizing selection

Question 8

Why is genetic diversity important for a population's survival?

Accepted Answer

It increases the likelihood that some individuals can survive environmental changes.

Question 9

Which of the following is an example of gene flow?

Accepted Answer

A population of birds migrates to a new island and breeds with the local population.

Question 10

A scientist observes that two populations of the same species have developed different mating calls. Which evolutionary process is most likely responsible for this difference?

Accepted Answer

Sexual selection

Question 11

Which of the following types of data provides evidence for evolution?

Accepted Answer

All of the above

Question 12

If $$p = 0.7 in a $$population, what is the value of $$q$$ according to the Hardy-Weinberg principle?

Accepted Answer

$$q = 0.3$$

Question 13

Which population is more susceptible to genetic drift?

Accepted Answer

A small population

Question 14

Which scenario best illustrates disruptive selection?

Accepted Answer

Both very light and very dark colored mice survive better than medium colored mice in a patchy environment.

Question 15

How do mutations contribute to evolution?

Accepted Answer

They introduce new genetic variation into a population.

Question 16

Which of the following best explains why populations with low genetic diversity are at greater risk of extinction?

Accepted Answer

They are less likely to have individuals with traits that can survive environmental changes.

Question 17

Which of the following is a direct result of gene flow between populations?

Accepted Answer

Increased genetic similarity between populations

Question 18

A population of rabbits has the following genotype frequencies: $$AA = 0.36$$, $$Aa = 0.48$$, $$aa = 0.16. $$What is the frequency of the $$A$$ allele?

Accepted Answer

$$0.6$$

Question 19

Which of the following is an example of a real-world selective pressure?

Accepted Answer

The use of antibiotics leading to antibiotic-resistant bacteria

Question 20

Which statement best describes the relationship between natural selection and mutations?

Accepted Answer

Mutations create genetic variation, and natural selection acts on this variation.

Population Genetics and Evolution: Study Guide

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