Ch 19: Praxis Biology & General Science: Mutations and Other Genetic Changes

About This Chapter

Our video lessons can teach you about the different types of genetic mutations and their causes. The lessons and self-assessment quizzes provide definitions and explain the processes associated with genetic changes and mutations to help you answer these types of questions on the Praxis II Biology and General Science exam.

Praxis Biology & General Science: Mutations and Other Genetic Changes - Chapter Summary

Enhance your knowledge of genetic mutations and other changes and prepare for the Praxis II Biology and General Science test with this chapter's video lessons. As you make your way through this chapter, you'll get details on the different types of mutations and definitions of key terms like bacterial conjugation and transformation. These lessons provide instruction in the following areas, which can help you answer related questions on the test:

  • How genetic mutations affect DNA
  • Effects of mutations on protein function
  • Frameshift mutations
  • Mutation rates
  • Somatic and germline mutations
  • Causes of mutation
  • Horizontal gene transfer methods

The professional instructors who teach these lessons describe each concept in detail and offer examples to help you understand the subject matter. These short video lessons include lesson summaries and links that provide you with more info on key terms. Transcripts also accompany each video, so you can read along.

Praxis Biology & General Science: Mutations and Other Genetic Changes Objectives

This Praxis II test is used in many states to assess aspiring science teachers' knowledge of the basic concepts and principles needed to teach biology and general science to students. Molecular and cellular biology is one of the content areas on the test and is where you'll find questions on mutations and other genetic changes. This content area represents 15% of the test and has about 18 questions on this topic. The Praxis II Biology and General Science test questions are all multiple-choice questions and are similar in format to the quizzes you'll find at the end of each of the video lessons offered in this chapter.

7 Lessons in Chapter 19: Praxis Biology & General Science: Mutations and Other Genetic Changes
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

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

2. 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.

Effects of Frameshift Mutations: Definitions and Examples

3. 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.

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.

Bacterial Conjugation: Definition & Protocol

5. Bacterial Conjugation: Definition & Protocol

You probably didn't know that bacteria can engage in sexual reproduction. It is not what you think. In this lesson we will explore the process of bacterial conjugation and its impact on genetic variability in bacteria.

Bacterial Transformation: Definition, Process & Applications

6. Bacterial Transformation: Definition, Process & Applications

DNA is all around you. So are bacteria. Did you know that those bacteria can pick up and use that DNA? In this lesson we will examine the process of transformation and how bacteria are able to make use of environmental DNA.

Bacterial Transduction: Definition, Process & Advantages

7. Bacterial Transduction: Definition, Process & Advantages

Genetic diversity allows organisms to adapt to changing environmental conditions. In this lesson, we will explore bacterial transduction and how it allows bacteria to transfer genes and increase genetic diversity.

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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