Ch 17: Genetic Variability & Analytic Methods

About This Chapter

Learn about genetic variability and analytic methods, including the causes of microevolution and the Hardy Weinberg Equilibrium. These brief lessons and quizzes can help you prepare for an exam or assess your understanding of the topics covered.

Genetic Variability & Analytic Methods - Chapter Summary

While going through these lessons, you will deepen your understanding of genetic variability and analytic methods. This self-paced chapter reviews the Hardy Weinberg Equilibrium, natural selection, gene flow, and more. After going through the lessons, you should be ready to:

  • Explain how gene pools change
  • Discuss how random mutations help a population adapt to unexpected changes
  • Describe the mechanisms behind microevolution that cause changes in allele frequencies
  • Recall the definition of bottleneck effect
  • Discuss different evolutionary agents of the Hardy Weinberg Equilibrium
  • Explain how to use a testcross to analyze genetics

These lessons on genetic variability and analytic methods can help you quickly get up to speed on the concepts covered. While going through the lessons, you will notice that the vocabulary words are highlighted in bold for quick reference. If you happen to get stuck on a topic, you can use the Help feature to submit questions to instructors. For those who prefer text-based learning, each lesson includes a full written transcript.

8 Lessons in Chapter 17: Genetic Variability & Analytic Methods
Test your knowledge with a 30-question chapter practice test
What is a Gene Pool? - Definition & Example

1. What is a Gene Pool? - Definition & Example

Your genes + everybody else's genes = the human gene pool. Learn about gene pools large and small, including how they can change and why they're more than meets the eye!

Genetic Variability and Random Mutation

2. Genetic Variability and Random Mutation

Evolution is driven by variation among populations. The amount of variability determines how well a population can adapt to environmental changes, while random mutations can provide new variations that help a population adapt to unexpected changes.

Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift

3. Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift

Environments are dynamic, which causes populations to be as well. In this lesson, you'll learn about microevolution, as well as the mechanisms behind it that cause changes in allele frequencies within populations.

Bottleneck Effect: Definition & Example

4. Bottleneck Effect: Definition & Example

In this lesson, you will learn what the bottleneck effect is and how it affects populations, read about some examples of the bottleneck effect, and even have a chance to ponder jelly beans.

Hardy-Weinberg Equilibrium I: Overview

5. Hardy-Weinberg Equilibrium I: Overview

In this lesson, we'll examine population genetics in greater detail. We'll also explore notions of Hardy-Weinberg equilibrium for large, stable populations. Is the genetic makeup of our flying hamster population changing? The Hardy-Weinberg equilibrium can serve as a reference point as we try to answer population genetics questions.

Hardy-Weinberg Equilibrium II: The Equation

6. Hardy-Weinberg Equilibrium II: The Equation

The Hardy-Weinberg equilibrium equation is represented by a polynomial, so we'll have to do some calculations. Don't be intimidated; a few coin tosses can help us make sense of allelic frequencies in a given gene pool.

Hardy-Weinberg Equilibrium III: Evolutionary Agents

7. Hardy-Weinberg Equilibrium III: Evolutionary Agents

In this lesson, you'll learn how the Hardy-Weinberg equation relates to different evolutionary agents and population changes. Discover how the equation may be used to discover populations that are not in equilibrium.

Analyzing Genetics With a Testcross

8. Analyzing Genetics With a Testcross

Genetic experiments can get pretty complicated. Sometime you just need a simple, reliable method for testing genetics, and that's where the testcross comes in handy. In this lesson we will look at what this is and how to use it.

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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