Question

Which of the following statements is true regarding mutations? (A) Mutations are irreversible. (B) Mutations are generally lethal to populations. (C) Mutations serve as a source for genetic variation in a population. (D) Mutations affect only certain gene loci in a population. (E) Mutation rates are very high in most populations.

Name: Problem 2, Chapter 12: Cracking the AP Biology Exam
Uploaded: 2021-06-28T19:22:14-08:00
Duration: 2 min 2 s
Channel: Kathleen Jerome
Description: Which of the following statements is true regarding mutations? (A) Mutations are irreversible. (B) Mutations are generally lethal to populations. (C) Mutations serve as a source for genetic variation in a population. (D) Mutations affect only certain gene loci in a population. (E) Mutation rates are very high in most populations.

    Which of the following statements is true regarding mutations?
(A) Mutations are irreversible.
(B) Mutations are generally lethal to populations.
(C) Mutations serve as a source for genetic variation in a population.
(D) Mutations affect only certain gene loci in a population.
(E) Mutation rates are very high in most populations.

Cracking the AP Biology Exam

Princeton Review 1st Edition

Chapter 12, Problem 2

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Solved by Expert Kathleen Jerome

06/28/2021

Step 1

A mutation is a change in the DNA sequence of a gene. This can occur due to errors during DNA replication or due to environmental factors such as radiation or chemicals. Show more…

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Which of the following statements is true regarding mutations? (A) Mutations are irreversible. (B) Mutations are generally lethal to populations. (C) Mutations serve as a source for genetic variation in a population. (D) Mutations affect only certain gene loci in a population. (E) Mutation rates are very high in most populations.

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Key Concepts

Mutation

A mutation is any change in the DNA sequence of an organism, which can range from a single base pair change to large insertions, deletions, or rearrangements of the entire chromosome. Mutations occur naturally as a result of errors during DNA replication, exposure to radiation, chemicals, or viral infections, and they are a fundamental mechanism for generating biological diversity.

Genetic Variation

Genetic variation refers to the differences in DNA sequences among individuals within a population. This diversity is critical for evolutionary processes, as it provides the raw material for natural selection, allowing populations to adapt to changing environments. Mutations are one of the primary sources of genetic variation, contributing to the emergence of new traits and aiding in the survival of species over time.

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