Ch 35: DNA & Forensic Evidence

About This Chapter

Utilize this overview of DNA and forensic evidence to increase your understanding of DNA sequencing, spectroscopy, gas chromatography, and more. These lessons can assist you with preparing for an exam or classroom discussion.

DNA & Forensic Evidence - Chapter Summary

This chapter is a quick and easy way to get up to speed on DNA and forensic evidence. Our expert instructors discuss topics like the equipment required to perform agarose gel electrophoresis and the use of forensic evidence to solve crimes. After completing the chapter, you should be able to:

  • List different types of forensic evidence
  • Define DNA and DNA sequencing
  • Recall how agarose gel electrophoresis works
  • Provide examples of destructive and non-destructive testing
  • Explain why chromatography is useful to forensic scientists
  • Discuss how scientists use gas chromatography and mass spectrometry
  • Recount different spectroscopic techniques
  • Describe methods for identifying chemicals in a solution

Our instructors assist you with quickly grasping the concepts presented. A brief quiz is available to test your understanding of each lesson, and the quizzes can be printed for use as an offline study tool. The quizzes link back to the related points in the lesson, so if you get a question wrong you can review that topic with just one click.

11 Lessons in Chapter 35: DNA & Forensic Evidence
Test your knowledge with a 30-question chapter practice test
Forensic Evidence: Types, Definition & Cases

1. Forensic Evidence: Types, Definition & Cases

The term 'forensic' actually means relating to law and science. In this lesson, we'll review different types of forensic evidence. We'll also look at real world cases where forensic evidence was used to solve crimes.

What is DNA?

2. What is DNA?

In this lesson, we will learn what DNA is, what its characteristics and functions are, even where it is located and what information it contains. We'll also learn how the double helix is created. Find out more.

DNA Sequencing: Definition, Methods & Applications

3. DNA Sequencing: Definition, Methods & Applications

DNA sequencing allows scientists to know the exact message coded in DNA. In this lesson, we'll talk about how DNA replication is the basis for sequencing, how scientists do DNA replication in the lab, and important uses for it in research and everyday life.

What is Agarose Gel Electrophoresis?

4. What is Agarose Gel Electrophoresis?

Agarose gel electrophoresis plays a key role in genetic engineering experiments. In this lesson, you'll learn what agarose is and how electrophoresis works. You'll also discover the use of agarose in this procedure.

Agarose Gel Electrophoresis: Equipment & Procedure

5. Agarose Gel Electrophoresis: Equipment & Procedure

This lesson will review the concepts and mechanisms of agarose gel electrophoresis. It will also summarize the equipment needed to perform the procedure for DNA analysis.

Agarose Gel Electrophoresis: Results Analysis

6. Agarose Gel Electrophoresis: Results Analysis

Gel electrophoresis is used to analyze DNA restriction digest and ligation experiments. In this lesson, you will learn how to use a DNA ladder to interpret experimental results.

Destructive & Non-Destructive Testing: Definition, Function & Examples

7. Destructive & Non-Destructive Testing: Definition, Function & Examples

In this lesson, you'll learn about why destructive tests are typically not desired and how non-destructive tests can be used instead. Then after learning this you can test your knowledge with a quiz!

Chromatography in Forensic Science

8. Chromatography in Forensic Science

In this lesson, we'll discuss what chromatography is and why it's useful to forensic scientists. We'll focus on thin-layer chromatography and how it works, but we'll also mention some other types of chromatography.

Gas Chromatography & Mass Spectrometry

9. Gas Chromatography & Mass Spectrometry

Scientists interested in identifying the individual chemicals in a mixture use an instrumental method called gas chromatography mass spectrometry or GC-MS. Continue reading to learn about the ins and outs of this fascinating chemistry technique.

Spectroscopy: Definition and Types

10. Spectroscopy: Definition and Types

In this video lesson, we will introduce and discuss different spectroscopic techniques used by scientists in an analytical lab. We will understand the importance of these techniques and show how they can be employed in identification and analysis.

How to Identify Chemicals in Solution: Test Methods & Materials

11. How to Identify Chemicals in Solution: Test Methods & Materials

Do you have a mysterious solution sitting around? Learn to identify it using one of the following methods: through precipitation, using conduction, using a flame test, using an acid-base indicator and observing the color of the solution.

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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