Question 1

Which of the following best describes the biological species concept?

Accepted Answer

A group of individuals that can interbreed in nature and produce viable, fertile offspring.

Question 2

A population of beetles is drastically reduced by a flood, and the surviving population has less genetic variation than the original. Which evolutionary process does this scenario illustrate?

Accepted Answer

Bottleneck effect

Question 3

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

Accepted Answer

Transfer of alleles between populations

Question 4

A small group of finches colonizes a new island, and their descendants show different allele frequencies than the original population. This is an example of:

Accepted Answer

Founder effect

Question 5

Which of the following is NOT a likely consequence of the bottleneck effect?

Accepted Answer

Increased genetic variation

Question 6

Hybridization occurs when:

Accepted Answer

Individuals from two different species with incomplete reproductive barriers mate

Question 7

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

Accepted Answer

High frequency of polydactyly in the Amish population

Question 8

In a hybrid zone, which outcome is characterized by hybrids being less fit than their parents, leading to fewer hybrids over time?

Accepted Answer

Reinforcement

Question 9

Which process is most likely to increase genetic similarity between two populations?

Accepted Answer

Gene flow

Question 10

A region where two species meet and produce some hybrid offspring each year, but the number of hybrids remains constant over time, is an example of:

Accepted Answer

Stability

Question 11

Which of the following best describes the effect of genetic drift on small populations?

Accepted Answer

It causes allele frequencies to fluctuate randomly from one generation to the next.

Question 12

Which scenario best illustrates gene flow?

Accepted Answer

A few wolves migrate from one pack to another, introducing new alleles.

Question 13

Which of the following is a real-world example of the bottleneck effect?

Accepted Answer

Low genetic diversity in elephant seals due to past hunting

Question 14

If two species in a hybrid zone experience increased gene flow and eventually merge into one species, this is an example of:

Accepted Answer

Fusion

Question 15

Which of the following equations represents the Hardy-Weinberg equilibrium for allele frequencies?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 16

Which of the following is NOT a requirement for a population to be in Hardy-Weinberg equilibrium?

Accepted Answer

Small population size

Question 17

A hybrid animal such as a wholphin (offspring of a false killer whale and a bottlenose dolphin) is an example of:

Accepted Answer

Hybridization between species

Question 18

Which of the following best explains why cheetahs have low genetic diversity?

Accepted Answer

They have experienced a severe population bottleneck in the past.

Question 19

Which of the following is a possible outcome of a hybrid zone over time?

Accepted Answer

All of the above

Question 20

A population of deer is split by a new highway, and over time, the two groups develop different allele frequencies. Which evolutionary process is most likely responsible?

Accepted Answer

Genetic drift

Population Connectivity, Genetic Drift, and Hybridization in Evolutionary Biology

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