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Ch 12: Holt McDougal Modern Biology Chapter 12: Inheritance Patterns and Human Genetics

About This Chapter

The Inheritance Patterns and Human Genetics chapter of this Holt McDougal Modern Biology textbook companion course helps students learn essential modern biology lessons on inheritance patterns and human genetics. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Inheritance Patterns and Human Genetics textbook chapter.

How it works:

  • Identify the lessons in the Holt McDougal Modern Biology Inheritance Patterns and Human Genetics chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the inheritance patterns and human genetics 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:

  • The genome
  • Exceptions to independent assortment
  • Chromosomal linkage and crossing over
  • How DNA is affected by mutations, insertions and deletions
  • Effects of frameshift mutations
  • Aneuploidy and nondisjunction
  • Lethal alleles
  • Research methods in human genetics
  • Pedigree analysis in human genetics
  • Genetic abnormalities in human growth and development
  • Polygenic traits
  • Genetic birth defects

Holt McDougal Modern Biology is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

12 Lessons in Chapter 12: Holt McDougal Modern Biology Chapter 12: Inheritance Patterns and Human Genetics
Test your knowledge with a 30-question chapter practice test
Basic Genetics: The Genome & Chromosomes

1. Basic Genetics: The Genome & Chromosomes

There are approximately 3 billion bases in the human genome. In this lesson, you'll learn more about the genome and its organization into chromosomes. We think about DNA often as the blueprint for life, but we can also think of it as the recipe for life with the nucleus being the library.

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

2. 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?

Crossing Over & Gene Linkage: Definition, Importance & Results

3. Crossing Over & Gene Linkage: Definition, Importance & Results

During this latest development of his flying hamster experiments, Adrian must learn about linked genes and recombinant chromosomes to unlock the mystery of the fire-breathing hamster. In this lesson, you'll look at another exception to Mendel's law of independent assortment.

What is a Point Mutation? - Definition, Causes & Types

4. What is a Point Mutation? - Definition, Causes & Types

What are genetic mutations? How do they affect our DNA? This lesson covers the basics of point mutations and provides simple examples of different mutation types.

Effects of Frameshift Mutations: Definitions and Examples

5. 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.

Nondisjunction & Aneuploidy: Definition & Examples

6. Nondisjunction & Aneuploidy: Definition & Examples

Learn why proper chromosome segregation is essential during meiosis. We'll see how having an extra chromosome can lead to Down Syndrome and also examine the consequences of having too few chromosomes. Disruptions to the delicate balance of cell division can have far-reaching effects.

Lethal Alleles: Definition & Examples

7. Lethal Alleles: Definition & Examples

Some alleles are recessive, some are dominant, and some are just plain bad. In this lesson, we'll learn about how rare lethal alleles can affect the survival of an organism. Specifically, we'll talk about how something like coat color can be lethal in agouti mice.

Human Genetics Research Methods: Pedigrees and Population Genetics

8. Human Genetics Research Methods: Pedigrees and Population Genetics

Have you ever wondered how people study human genetics? Do you know what a pedigree or a complex disease is? In this lesson you'll learn about some of the techniques that human geneticists use and what pedigrees and complex diseases have to do with human genetics.

Pedigree Analysis in Human Genetics: Inheritance Patterns

9. Pedigree Analysis in Human Genetics: Inheritance Patterns

So you've learned what a pedigree is and how to read or even create one. Now you're ready to learn how to analyze a pedigree and figure out what kind of inheritance pattern a genetic condition follows!

Genetic Abnormalities in Human Growth and Development

10. Genetic Abnormalities in Human Growth and Development

What are mutations and other chromosome abnormalities? How can these abnormalities affect human development? What are some common genetic disorders and their causes? Learn the answers to these questions in this lesson.

Polygenic Traits: Definition & Examples

11. Polygenic Traits: Definition & Examples

If variety is the spice of life, polygenic inheritance is one genetic mechanism giving us a continuous range of possibilities. In this lesson, learn how a polygenic trait, like height, can be controlled by multiple genes.

Genetic Birth Defects: Risk Factors, Epidemiology, and Testing

12. Genetic Birth Defects: Risk Factors, Epidemiology, and Testing

This lesson will define birth defects, point some major ones out, and discuss the many different kinds of risk factors. Finally, it will outline the major categories of tests available for assessing the risk for or diagnosing genetic birth defects.

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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