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Ch 14: GRE Biology: Genetic Mutations

About This Chapter

Review genetic mutations to prepare for the GRE Biology test. Our video lessons and lesson quizzes provide an efficient way to refresh your knowledge of the different types of mutations and their effects.

Genetic Mutations - Chapter Summary

Our expert instructors have designed engaging and impactful video lessons to help you learn about genetic mutations. These lessons cover what you need to know to answer related questions on the GRE Biology test, including:

  • How DNA is affected by point mutations, insertions and deletions
  • The effects of mutations on protein functions
  • Environment's effect on mutation rates
  • Frameshift mutations
  • Cancer at the genome level

Each lesson in this genetic mutations chapter breaks down complex concepts into easy-to-learn components to ensure you understand the material. There is no limit on the number of times you can watch the video lessons, and you can use the jump feature in the timeline to just watch the main points in the video. To further help you prepare, take a chapter exam to assess your comprehension of the information covered in the lessons.

GRE Biology Objectives

The GRE Biology test is an achievement test for applicants applying to graduate programs. The test consists of 190 multiple-choice questions that are broken down into three main categories: cellular and molecular biology, organismal biology, and ecology and evolution. Approximately equal weight is given to each category. Questions about genetic mutations may be included in the cellular and molecular biology category or the ecology and evolution category.

Each question on the GRE Biology test has five answer options to choose from. The test is given three times per year in September, October and April in paper format.

5 Lessons in Chapter 14: GRE Biology: Genetic Mutations
Test your knowledge with a 30-question chapter practice test
What is a Point Mutation? - Definition, Causes & Types

1. What is a Point Mutation? - Definition, Causes & Types

Point mutations are changes to the genetic sequence where a single nucleotide base is changed, inserted, or deleted. Explore the definition and causes of point mutations and discover the difference between the two basic types: base substitutions and insertion and deletion.

Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

2. Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

Proteins are vital for healthy cells, and protein function can be negatively affected by point mutations. Learn about missense, nonsense, and silent mutations and understand the effects mutations have on the function of proteins.

Mutagens: How the Environment Affects Mutation Rates

3. Mutagens: How the Environment Affects Mutation Rates

Mutations are caused by environmental agents called mutagens. Explore how mutations are formed, the role of DNA polymerase in preventing mutations, and how mutations affect the real world.

Effects of Frameshift Mutations: Definitions and Examples

4. Effects of Frameshift Mutations: Definitions and Examples

Frameshift mutations happen when a protein is drastically changed because of an insertion or a deletion. Review the different types of mutations, the codon reading frame, and how damaging frameshift mutations really are.

Cancer at the Level of the Genome

5. Cancer at the Level of the Genome

Cancer can be caused by genetic factors, where a cell's genome, or DNA, grows differently than it would normally. Explore the features of genetics in this process through proto-oncogenes, mutation and tumor suppressor genes like the famous p53 gene.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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