Ch 22: Understanding Principles of Heredity

About This Chapter

Let us help you prepare for a test that covers the principles of heredity by exploring the study tools in this chapter. Review bite-sized lessons to boost your knowledge, and take multiple-choice quizzes to confirm your understanding of the presented topics.

Understanding Principles of Heredity - Chapter Summary

If you seek to better understand the principles of heredity, this chapter can help. Top instructors have designed informative lessons you can review to study properties of alleles, genetic engineering, gene therapy, gene-environment interaction and more. Upon completion of this chapter, you will be able to:

  • Define and describe the structure of a gene
  • Differentiate between asexual and sexual reproduction
  • Compare and contrast genotypes and phenotypes
  • Describe Mendel's first law and discuss its application
  • Discuss Mendel's second law
  • Exhibit knowledge of Mendel's dihybrid cross example
  • Explain exceptions to simple dominance and independent assortment
  • List and discuss practical applications of DNA technology

Take control of your studying process by utilizing the resources in this chapter in any manner that you wish. Select any lessons to study and find out how well you understand their contents by taking accompanying quizzes. Clarify details you don't fully comprehend by submitting your questions to our experts via the Dashboard. These resources are accessible 24 hours a day via any computer, smartphone or tablet with an Internet connection.

15 Lessons in Chapter 22: Understanding Principles of Heredity
Test your knowledge with a 30-question chapter practice test
What Is a Gene? - Definition & Structure

1. What Is a Gene? - Definition & Structure

Genes are little codes found in our cells that make up who we are. This lesson covers where genes are located, how we get our genes, and the functions of genes.

Gene-Environment Interaction

2. Gene-Environment Interaction

The following lesson explores how genes and a person's environment influence behavior and outward expression of traits. A short quiz will follow the lesson to check your understanding of this timely topic.

Asexual vs. Sexual Reproduction: Comparison & Characteristics

3. Asexual vs. Sexual Reproduction: Comparison & Characteristics

Did you know that some organisms can reproduce without a mate? Check out this video lesson on asexual versus sexual reproduction to discover the different ways organisms can reproduce and the main differences between mitosis and meiosis.

What are Genotypes? - Definition & Examples

4. What are Genotypes? - Definition & Examples

In this lesson, you will learn about what genotypes are, where they come from and how they play a major role in determining how your body works and what you look like.

What Is a Phenotype? - Definition & Example

5. What Is a Phenotype? - Definition & Example

Do you have blue eyes or brown eyes, or something else, like hazel? That's your phenotype for eye color. Discover examples of phenotypes, and how they are (partly) determined by your genes.

Properties of Alleles

6. Properties of Alleles

What is a dominant phenotype and how will it affect Adrian's flying hamster research? Tune in as he studies homozygous and heterozygous genotypes and the phenotypes they produce.

Mendel's First Law: The Law of Segregation

7. Mendel's First Law: The Law of Segregation

Breaking up is a hard thing to do, but homologous chromosomes always go their separate way. What effect does chromosome segregation have on genetics? We look once more to Adrian's flying hamsters for answers.

Application of Mendel's First Law

8. Application of Mendel's First Law

Hollywood Squares? No, it's Punnett Squares! Those wacky diagrams are a geneticist's best friend. See how they turn geneticists into soothsayers, predicting the genotypic and phenotypic future.

Mendel's Second Law: The Law of Independent Assortment

9. Mendel's Second Law: The Law of Independent Assortment

Understanding how Mendel's law of independent assortment describes inheritance of genes is as easy as flipping a coin. Grab a few coins, cue up the video and see how.

Mendel's Dihybrid Cross Example: Practice & Ratio

10. Mendel's Dihybrid Cross Example: Practice & Ratio

Oh no! Twice the genes and sixteen genotypes - a dihybrid cross seems overwhelming to understand. Never fear though, Punnett squares will save the day!

Exceptions to Simple Dominance: Codominance and Incomplete Dominance

11. Exceptions to Simple Dominance: Codominance and Incomplete Dominance

Have you ever wondered what it means if someone is a universal donor or acceptor of blood? See how genetic interactions play a key role in this trait.

Exceptions to Independent Assortment: Sex-Linked and Sex-Limited Traits

12. Exceptions to Independent Assortment: Sex-Linked and Sex-Limited Traits

More men are color blind compared women. But often, not every brother, cousin or uncle in a family tree is color blind. Why not? How can genetics explain this seemingly complex inheritance pattern?

What is Genetic Engineering? - Definition and Examples

13. What is Genetic Engineering? - Definition and Examples

How do we make the insulin used by diabetic patients? In this lesson, you'll learn the basics of how genetic engineering can be used to transform a bacterial host cell into a genetically-modified organism that produces human insulin.

What is Gene Therapy? - Definition, History Pros, Cons & Examples

14. What is Gene Therapy? - Definition, History Pros, Cons & Examples

Learn how gene therapy is used to treat disease, the history of the treatment and its trials, as well as the pros and cons associated with this controversial new technique.

Practical Applications of DNA Technology

15. Practical Applications of DNA Technology

DNA technology is a field that has many applications for our everyday lives. In this video lesson, you will learn about some of the important contributions of DNA technology to industries such as medicine, agriculture and criminal investigation.

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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