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 Campbell Biology: Online Textbook Help
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Ch 23: Campbell Biology Chapter 23: The Evolution of Populations

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About This Chapter

The Evolution of Populations chapter of this Campbell Biology Companion Course helps students learn the essential lessons associated with the evolution of populations. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Evolution of Populations textbook chapter.

How It Works:

  • Identify the lessons in the Campbell Biology Evolution of Populations chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the evolution of populations topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Sources of genetic variation
  • The Hardy-Weinberg equilibrium equation
  • How an evolutionary agent is defined
  • Kinds of genetic drift
  • Causes of microevolution
  • Different kinds of natural selection
  • Forms of sexual selection
  • Types of balancing selection

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9 Lessons in Chapter 23: Campbell Biology Chapter 23: The Evolution of Populations
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What Is Genetic Variation? - Sources, Definition & Types

1. What Is Genetic Variation? - Sources, Definition & Types

Genetic variation is the diversification of alleles and genes within a specific population to create a healthy gene pool. Learn about the types of genetic variation, continuous and discrete traits and the sources of genetic variation.
Hardy-Weinberg Equilibrium I: Overview

2. Hardy-Weinberg Equilibrium I: Overview

The Hardy-Weinberg equilibrium equation is regularly used to describe genotypic frequency in a population. Learn more on Hardy-Weinberg Equilibrium I, the five criteria and it's usage in the genetics of a population.
Hardy-Weinberg Equilibrium II: The Equation

3. Hardy-Weinberg Equilibrium II: The Equation

The Hardy-Weinberg equilibrium equation helps in analyzing and understanding the gene pool of a population. Learn about this equation, including the variables it represents and where to find these variables, understand alleles and genotypes, and explore the significance of allelic and genotypic frequencies.
Hardy-Weinberg Equilibrium III: Evolutionary Agents

4. Hardy-Weinberg Equilibrium III: Evolutionary Agents

The Hardy-Weinberg equilibrium equation has been developed to be used to test the evolutionary status of a population. Learn more about evolutionary agents, non-random mating, natural selection, genetic drift, population bottleneck and the founder effect.
Genetic Drift: Definition, Examples & Types

5. Genetic Drift: Definition, Examples & Types

Genetic drift happens when chance events cause changes in the genetic variations of a population. Examine the definition and learn the types of genetic drift. See examples of population bottlenecking and the founder effect.
Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift

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

Microevolution is affected by different factors, such as environmental and internal factors regarding the species. Learn about species-level evolution, natural selection, gene flow, and genetic drift.
Natural Selection: Definition, Types & Examples

7. Natural Selection: Definition, Types & Examples

Natural selection is a process in the evolution and adaptation of organisms to increase primary characteristics. Learn about the process of natural selection, the different types of natural selection, and the concept of polymorphism.
Sexual Selection: Definition & Forms

8. Sexual Selection: Definition & Forms

Why are you attracted to someone? One reason may be due to the forces of sexual selection. This lesson will explain sexual selection and will investigate types of sexual selection.
Balancing Selection: Heterozygote Advantage & Frequency-Dependent Selection

9. Balancing Selection: Heterozygote Advantage & Frequency-Dependent Selection

In natural selection, it is important to understand heterozygote advantage and frequency-dependent selection. In this lesson, dive into balancing selection, the heterozygote advantage, and frequency-dependent selection.
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Practice Final Exam
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