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Ch 19: Gene Mutations

About This Chapter

Use the lessons in this chapter to brush up on what you've learned about gene mutations. Take quizzes along the way to test your knowledge of the topics.

Gene Mutations - Chapter Summary

In this chapter, you'll explore various gene mutations and examine the effects they have on our bodies. You'll also review how mutations occur. By the end of this chapter, you'll have studied:

  • Errors in DNA replication
  • How various mutations affect DNA and protein function
  • Mutagens and cancer at the genome level
  • Point mutations in DNA
  • Effects of frameshift mutations

We strive to maintain an effective and enjoyable learning experience. For these lessons, our instructors have developed fun, informative videos to help illustrate the material. You can take a quiz after each lesson to apply what you've learned. If you need to return to a particular portion of the lesson, utilize the timeline below each video for easy navigation. After completing all of the lessons, take a cumulative chapter exam to see how well you've retained the information.

7 Lessons in Chapter 19: Gene Mutations
Test your knowledge with a 30-question chapter practice test
Mutations: When DNA Is Copied Wrong

1. Mutations: When DNA Is Copied Wrong

In this lesson, we will learn how mutations, or errors in DNA, come about, what kinds of effects they may have, and how they can impact populations as a whole.

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

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

What are genetic mutations? How do they affect our DNA? This lesson covers the basics of point mutations and provides simple examples of different mutation types.

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

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

How does a tiny point mutation change the way a protein works? What are the consequences of base substitutions? In this lesson, we'll use an imaginary creature to explore missense, nonsense and silent mutations.

Mutagens: How the Environment Affects Mutation Rates

4. Mutagens: How the Environment Affects Mutation Rates

What causes mutations to occur in living things? How do we avoid mutations? Are mutations always bad? Discover answers to these questions and more in this lesson on mutagens.

Effects of Frameshift Mutations: Definitions and Examples

5. Effects of Frameshift Mutations: Definitions and Examples

What is a frameshift in genetic translation? How can a frameshift mutation change a protein? In this lesson, learn about the codon reading frame and how frameshift mutations cause serious problems for polypeptide formation.

Point Mutations in DNA: Types, Diseases & Examples

6. Point Mutations in DNA: Types, Diseases & Examples

Did you know that very small changes in DNA sequences called point mutations can have huge impacts on the body? Learn about different types of point mutations and a few of the diseases they can cause in this lesson.

Cancer at the Level of the Genome

7. Cancer at the Level of the Genome

This lesson will delve into the genetic changes that may occur during cancer formation. You'll learn about proto-oncogenes, oncogenes, tumor suppressor genes, viral oncogenesis, p53, and more.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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