Q: A population of beetles has two alleles for color: green ($$G) $$and brown ($$g). If $$the frequency of $$G is$$ $$p = 0.7$$ and $$g is$$ $$q = 0.3$$, what is the expected frequency of heterozygotes ($$Gg) $$under Hardy-Weinberg equilibrium?

$$2pq = 2 \times 0.7 \times 0.3 = 0.42$$

Question 1

Which of the following best describes the principle of inheritance of acquired characteristics as proposed by Lamarck?

Accepted Answer

Traits acquired during an organism's lifetime are passed on to its offspring.

Question 2

A population of beetles has two alleles for color: green ($$G) $$and brown ($$g). If $$the frequency of $$G is$$ $$p = 0.7$$ and $$g is$$ $$q = 0.3$$, what is the expected frequency of heterozygotes ($$Gg) $$under Hardy-Weinberg equilibrium?

Accepted Answer

$$2pq = 2 	imes 0.7 	imes 0.3 = 0.42$$

Question 3

Which of the following is NOT a fundamental characteristic of life?

Accepted Answer

Ability to photosynthesize

Question 4

Which scenario best illustrates the founder effect?

Accepted Answer

A small group of birds migrates to a new island and establishes a population with different allele frequencies than the original population.

Question 5

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They cannot replicate independently without a host cell.

Question 6

Which of the following is an example of stabilizing selection?

Accepted Answer

Human birth weights are most commonly in the middle range, with very high and very low weights having lower survival rates.

Question 7

Which term describes the process by which unrelated organisms independently evolve similar traits due to similar environmental pressures?

Accepted Answer

Convergent evolution

Question 8

Which of the following is a postzygotic reproductive isolation mechanism?

Accepted Answer

Hybrid sterility

Question 9

A scientist observes that two species of frogs live in the same pond but breed at different times of the year. What type of reproductive isolation is this?

Accepted Answer

Temporal isolation

Question 10

Which of the following best describes the difference between a scientific theory and a hypothesis?

Accepted Answer

A theory is a well-supported explanation based on evidence, while a hypothesis is a testable prediction.

Question 11

Which of the following is an example of artificial selection?

Accepted Answer

Breeding dogs to enhance specific traits such as size or temperament.

Question 12

Which equation represents the Hardy-Weinberg equilibrium for a gene with two alleles?

Accepted Answer

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

Question 13

Which of the following is a requirement for a population to be in Hardy-Weinberg equilibrium?

Accepted Answer

No migration (gene flow) occurs between populations.

Question 14

Which concept defines a species as a group of organisms that can interbreed and produce fertile offspring?

Accepted Answer

Biological species concept

Question 15

Which of the following is an example of homologous structures?

Accepted Answer

The forelimbs of humans, bats, and whales, which have similar bone arrangements but different functions.

Question 16

Which mechanism of evolution is most likely to increase genetic variation in a population?

Accepted Answer

Mutation

Question 17

Which of the following best describes the Law of Superposition?

Accepted Answer

In undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

Question 18

Which of the following is an example of gene flow?

Accepted Answer

Migration of individuals from one population to another, introducing new alleles.

Question 19

Which of the following is a real-world example of directional selection?

Accepted Answer

Antibiotic resistance in bacteria, where resistant individuals survive and reproduce.

Foundations of Evolution and the Characteristics of Life: Study Guide

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