Ch 14: Genetic Inheritance & Pedigrees

About This Chapter

With this overview of genetic inheritance and pedigrees, improve your understanding of topics like Mendel's first and second laws, exceptions to independent assortment, and chromosomal linkage. Concise but filled with key information, the lessons are designed to help you with homework or test preparation.

Genetic Inheritance & Pedigrees - Chapter Summary

Studying these lessons will help you improve your understanding of genetic inheritance and pedigrees. Topics like pedigree analysis in human genetics and the influence of sex-linked and polygenic inheritance on human development are covered in this chapter. After reviewing the lessons, you should be ready to do the following:

  • Discuss the influence single gene-pair inheritance has on human development
  • Describe the effect chromosome segregation has on genetics
  • Explain what it means to be a universal donor
  • Discuss how genetics explain a complex inheritance pattern
  • Use probability to solve complex genetics problems
  • Recognize exceptions to Mendel's law of independent assortment
  • Analyze a pedigree to determine the kind of inheritance pattern a genetic condition follows
  • Discuss ethical implications of genetic testing

The lessons found in this chapter will help you better understand concepts related to genetic inheritance and pedigrees. Major vocabulary words are highlighted in bold to emphasize important topics. A brief quiz is available to test your knowledge after each lesson, and the quizzes can be printed.

15 Lessons in Chapter 14: Genetic Inheritance & Pedigrees
Test your knowledge with a 30-question chapter practice test
The Influence of Single Gene-Pair Inheritance on Development

1. The Influence of Single Gene-Pair Inheritance on Development

What is single gene-pair inheritance? What influence does it have on human development? Learn the answers to these questions as we explore this area of genetic inheritance in this video lesson.

The Influence of Sex-Linked and Polygenic Inheritance on Development

2. 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.

Mendel's First Law: The Law of Segregation

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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?

Using Probability to Solve Complex Genetics Problems

9. Using Probability to Solve Complex Genetics Problems

In this lesson, you're going to learn how to use Punnett squares and the multiplication rule to quickly solve complex genetic problems with respect to the law of independent assortment.

Crossing Over & Gene Linkage: Definition, Importance & Results

10. 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.

Monohybrid Cross: Definition & Example

11. 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.

Gene Linking & Mapping: Definition & Example

12. Gene Linking & Mapping: Definition & Example

This lesson explains gene linking. Gene linkage was first understood by Thomas Hunt Morgan. His experiments are used as examples to show how gene linkage can be used to understand gene mapping.

Pedigree Analysis in Human Genetics: Tutorial

13. Pedigree Analysis in Human Genetics: Tutorial

One of the oldest genetic techniques is pedigree analysis, and yet it is still used every day all around the world by doctors, geneticists, and genetic counselors. Building and reading a pedigree is actually fairly easy if you know what the symbols mean. In fact, it's so easy that you can learn how to do it in less than ten minutes if you watch this video!

Pedigree Analysis in Human Genetics: Inheritance Patterns

14. 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 Testing & Screening: Social & Ethical Considerations

15. Genetic Testing & Screening: Social & Ethical Considerations

In this lesson, we'll explore the big issue of genetic testing and screening. Let's take a look how it can change a person's life and affect the lives of those close to them.

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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