Ch 29: Genetics & Populations

About This Chapter

Let us help you study for a test covering genetics and populations using the helpful resources in this chapter. Benefit from access to engaging lessons, short quizzes, and a practice exam that can improve your comprehension and simplify the studying process.

Genetics & Populations - Chapter Summary

Use this overview of genetics and populations to better understand changes in the genetic makeup of a population. Lessons provide in-depth analyses of gene flow, genetic drift, allopatric speciation, point mutations and more. Navigate the lessons at a comfortable pace. When finished, you should be able to:

  • List the types, processes and effects of point mutations
  • Discuss the effects of frameshift mutations
  • Share the definitions of aneuploidy and polyploidy
  • Explain why natural selection acts on phenotype instead of genotype
  • Define gene flow and genetic drift
  • Describe the genetic implications of the gene pool
  • Provide details about genome evolution and artificial selection in evolution
  • Understand the meaning of allopatric speciation

All resources in this chapter are available in a secure online environment that enables you to study genetics and populations anytime using your computer, smartphone or tablet. Choose the lessons you want to review and visit them as often as you'd like to ensure you fully comprehend the topics they cover. Take their multiple-choice quizzes to gauge your genetics and populations knowledge. Get an even broader review by taking this chapter's comprehensive practice exam.

10 Lessons in Chapter 29: Genetics & Populations
Test your knowledge with a 30-question chapter practice test
Point Mutations: Types, Processes & Effects

1. Point Mutations: Types, Processes & Effects

You might not think about your DNA that often, but you would probably notice if something was mutated on your DNA! This lesson will discuss what happens when your DNA gets mutated, focusing specifically on point mutations and their impacts.

Effects of Frameshift Mutations: Definitions and Examples

2. 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.

Aneuploidy & Polyploidy: Definition & Examples

3. Aneuploidy & Polyploidy: Definition & Examples

We are going to cover the terms ploidy, aneuploidy, and polyploidy in this lesson. We'll also explain how each of these occurs and get examples of each.

Why Natural Selection Acts on Phenotype, Not Genotype

4. Why Natural Selection Acts on Phenotype, Not Genotype

Evolution works through the mechanism of natural selection. This mechanism influences the genetic make-up of populations, acting on the population's physical traits. In this lesson, we'll explore examples of why this is.

Gene Flow: Definition & Examples

5. Gene Flow: Definition & Examples

Chances are you've probably witnessed gene flow today! This lesson will define gene flow and give examples. It will also explain why gene flow creates genetic diversity.

Genetic Drift: Definition, Examples & Types

6. Genetic Drift: Definition, Examples & Types

Genetic drift reduces genetic variability of a population by decreasing the size of the population. The change in population size and variability often leads to new species and unique populations.

Genetic Implications of the Gene Pool

7. Genetic Implications of the Gene Pool

This lesson explores the relationship between the gene pool, genetic diversity, as well as factors such as population size and inbreeding and their effect on the gene pool.

Genome Evolution: Duplication, Rearrangement & Mutation

8. Genome Evolution: Duplication, Rearrangement & Mutation

The entire genome of a species can evolve in novel ways that may lead to death or to the development of a new species. This can happen through duplication, rearrangement, and mutation.

Allopatric Speciation: Example & Definition

9. Allopatric Speciation: Example & Definition

If a continent splits, or a mountain range rises, one population can become two, and eventually the two populations may not be able to interbreed. Discover how species can split off from each other when they are separated.

Artificial Selection in Evolution

10. Artificial Selection in Evolution

Humans have been selectively breeding for desirable traits in plants and animals for a long time. This artificial selection allows for a lot of control in the breeding process but can also lead to unintended mutations within a population of organisms.

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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