Ch 4: Basic Genetics Concepts

About This Chapter

In this overview of basic genetics, you can review subjects like chromatin structure, dihybrid cross, Barr bodies, and more. The self-paced lessons in this chapter can be a valuable resource to use when preparing for a test or working on class assignments.

Basic Genetics Concepts - Chapter Summary

As you go through these lessons on basic genetics, you will have an opportunity to review mutations and the properties of alleles. You can also gain an understanding of Mendel's discovery concerning genetics. By the end of the chapter, you should be ready to:

  • Discuss the function and structure of chromosomes
  • Describe how chromatin structure is regulated
  • Explain how genes determine your appearance
  • Provide examples of monohybrid cross and dihybrid cross
  • Discuss the work of Gregor Mendel
  • Recall complex chromosomal processes
  • Explain sex-linked inheritance

These engaging lessons can help you easily understand the concepts presented. You can review all the lessons in order, or just review the topics you need to review. A brief quiz is available for each lesson to test your understanding.

10 Lessons in Chapter 4: Basic Genetics Concepts
Test your knowledge with a 30-question chapter practice test
What Are Chromosomes? - Definition, Function, Types & Structure

1. What Are Chromosomes? - Definition, Function, Types & Structure

In this lesson, you'll find out why primates look so human while learning about the different types of chromosomes and how they work. You'll also get a chance to see what a chromosome looks like and discover how many genes are found in the human body.

Chromatin Structure: Regulation & Modifications

2. Chromatin Structure: Regulation & Modifications

While your DNA consists of many, many genes, each cell only expresses a few specific ones at a time. Mechanisms are in place to regulate which genes are turned on or off in each cell, as well as whether those instructions should be passed on to new cells.

What Are Genes? - Definition, Types & Function

3. What Are Genes? - Definition, Types & Function

It's in the genes. Height, sense of humor, or athletic skill are all traits we've heard as being in the genes. But what are genes really, and how do they influence who we are, what we look like, and how we function?

Properties of Alleles

4. 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.

Mutations: When DNA Is Copied Wrong

5. Mutations: When DNA Is Copied Wrong

In this lesson, we will learn how mutations, or errors in DNA, come about, what kinds of effects they may have, and how they can impact populations as a whole.

Monohybrid Cross: Definition & Example

6. Monohybrid Cross: Definition & Example

Some genetic characteristics are inherited in predictable patterns. In this lesson you will learn what monohybrids are and how to predict the kinds of characteristics that their offspring will show.

Dihybrid Cross: Definition & Example

7. Dihybrid Cross: Definition & Example

In this lesson, learn what a dihybrid cross is and see an example. Also, find out about phenotypic ratio and how it's the same for each dihybrid cross. After the lesson, test your knowledge with a quiz.

Gregor Mendel & Genetics: Experiments, Laws & Discovery

8. Gregor Mendel & Genetics: Experiments, Laws & Discovery

Gregor Mendel is currently known as the Father of Modern Genetics. This lesson goes through a brief history of his life, workings as a scientist, and his findings.

Sex Determination, X-Inactivation, and Barr Bodies

9. Sex Determination, X-Inactivation, and Barr Bodies

Sex determination, X-inactivation and Barr bodies are complex chromosomal processes. Learn more about each of these processes and test your knowledge with a quiz.

The Influence of Sex-Linked and Polygenic Inheritance on Development

10. The Influence of Sex-Linked and Polygenic Inheritance on Development

What is sex-linked inheritance? What influence does it have on human development? What does it mean if a trait is polygenic? Learn the answers to these questions as this lesson explores this area of genetic inheritance.

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.
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