Ch 21: Overview of Genetics & DNA

About This Chapter

Give yourself the knowledge boost you need to take and excel on a test covering the basics of genetics and DNA. The quizzes and practice exam are designed to check your comprehension before the day of your test.

Overview of Genetics & DNA - Chapter Summary

This engaging overview is designed to help you better understand the function of DNA in cells as well as DNA replication and the causes of mutation. Refresh or expand your knowledge of genetics and DNA with help from our expert instructors. Upon completion of this chapter, you will be ready to:

  • Describe the structure and function of DNA in heredity
  • Explain the process of DNA replication
  • Discuss how the central dogma relates to protein synthesis
  • Detail the impact an environment can have on mutation rates
  • Share the effects of frameshift mutations on proteins
  • Define and discuss causes and types of point mutations
  • Provide details about the effects of mutations on protein function

Each lesson in this chapter is accompanied by a short quiz you can take anytime to check your knowledge of topics covered. Any questions you think up while exploring the lessons can be submitted to our experts via the Dashboard. The practice exam is fantastic for gauging your overall comprehension of genetics and DNA before taking your test. Around-the-clock access to these resources ensures you're able to study during time frames that perfectly align with your personal schedule.

7 Lessons in Chapter 21: Overview of Genetics & DNA
Test your knowledge with a 30-question chapter practice test
DNA: Discovery, Facts, Structure & Function in Heredity

1. DNA: Discovery, Facts, Structure & Function in Heredity

This lesson will help you to navigate the twists and turns of DNA's structure. We'll also clue you in on the amazing discoveries that put this nucleic acid in the limelight as the molecule of heredity.

How Does DNA Replicate?

2. How Does DNA Replicate?

In this lesson, we will learn why DNA replicates as well as how. We'll also learn about the rates of replication and how DNA proofreads itself. After watching the lesson, you can complete a short quiz to test your knowledge.

Protein Synthesis in the Cell and the Central Dogma

3. Protein Synthesis in the Cell and the Central Dogma

Learn the story of the central dogma and how it relates to protein synthesis. We'll use a simple analogy to explore the roles of transcription and translation in building protein from the DNA code. In this lesson, we'll also introduce the concept of a gene.

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.

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

5. 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

6. 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

7. 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.

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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