Ch 17: Genetics - Principles of Heredity: Help and Review

About This Chapter

The Genetics - Principles of Heredity chapter of this College Biology Help and Review course is the simplest way to master the principles of heredity. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of genetics.

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Anyone who needs help learning or mastering college biology material will benefit from taking this course. There is no faster or easier way to learn college biology. Among those who would benefit are:

  • Students who have fallen behind in understanding Mendel's first and second laws, chromosomal linkage, simple dominance or independent assortment
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning science (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about genetics
  • Students who struggle to understand their teachers
  • Students who attend schools without extra science learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the Genetics - Principles of Heredity chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Genetics - Principles of Heredity chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any genetics question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll find answers to questions including?

  • What are the properties of alleles?
  • How does Mendel's first law explain chromosome segregation?
  • How does Mendel's second law explain independent assortment?
  • What are the exceptions to simple dominance?
  • What are the exceptions to independent assortment?
  • How can model organisms help us study human genetics?

35 Lessons in Chapter 17: Genetics - Principles of Heredity: Help and Review
Test your knowledge with a 30-question chapter practice test
Genetics: Heredity, Traits & Chromosomes

1. Genetics: Heredity, Traits & Chromosomes

We view manipulation of genes in our crops and livestock as a recent development. Yet, man has been manipulating the genetic makeup of his food for thousands of years through cultivation and breeding. This lesson will begin to help you understand how genetics works.

Properties of Alleles

2. 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

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?

Crossing Over & Gene Linkage: Definition, Importance & Results

9. 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.

Human Genetics: Multifactorial Traits & Model Organisms

10. Human Genetics: Multifactorial Traits & Model Organisms

How do we study human genetics when most traits arise from multiple genes? It's certainly more complicated that drawing a simple Punnett square. Never fear, for model organisms are here!

Additive Alleles: Definition & Characteristics

11. Additive Alleles: Definition & Characteristics

This lesson will provide a description and examples of one of the many factors that lead to genetic variation: additive alleles. Following the lesson, there will be a brief quiz so that you can see how well you understood the concepts.

How Does the Adiabatic Process Work? - Definition & Examples

12. How Does the Adiabatic Process Work? - Definition & Examples

In this lesson we will be learning about the adiabatic process. After learning the definition, we will explore examples that help demonstrate how this process occurs in nature.

What are Genotypes? - Definition & Examples

13. 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.

Genotypic Frequency: Definition & Explanation

14. Genotypic Frequency: Definition & Explanation

In this lesson, we will explore what genotype frequency is. We'll examine many important facets of genetic inheritance such as what the term genotype refers to, what a phenotype is, what role alleles play in inheritance and what the variations of genotypes are that result in enabling genotype frequency calculations.

Monophyletic Groups: Definition & Examples

15. Monophyletic Groups: Definition & Examples

This lesson describes monophyletic groups and the characteristics that define monophyletic groups. This lesson details the importance and usefulness of monophyletic groups and how monophyletic groups are visually represented.

Multiple Alleles: Definition & Example

16. Multiple Alleles: Definition & Example

This lesson introduces the concept of multiple alleles. It provides the definition of multiple alleles and presents several examples of this type of trait within both human and animal populations.

Random Assortment of Chromosomes: Definition & Explanation

17. Random Assortment of Chromosomes: Definition & Explanation

Random assortment of chromosomes is one of the reasons why some siblings look alike and others look so different from each other. Read about the what, why and how of this key, yet arbitrary, mechanism contributing to genetic variation.

Simple Dominance: Definition & Concept

18. Simple Dominance: Definition & Concept

Discover the meaning of simple dominance and learn how different variations of a gene influence the traits we see. Find out whether simple dominance is expressed in humans.

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

19. 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.

What Is Assortative Mating?

20. What Is Assortative Mating?

Assortative mating is a scientific term that describes how some animals choose reproductive partners in a non-random way. This lesson defines this mating pattern and gives some examples.

Y Chromosome: Definition, Disorders & Structure

21. Y Chromosome: Definition, Disorders & Structure

The Y chromosome is found in males and is one of two chromosomes that determine gender. This article focuses on the Y chromosome, the genes it contains, and disorders that are related to this structure in men.

Genetic Engineering & Insulin Production

22. Genetic Engineering & Insulin Production

This lesson will provide an introduction to genetic engineering, including its definition, the tools it requires, and the types of products it can be used to create. This lesson will focus on one of its most common products - insulin.

Genetic Linkage: Definition & Analysis

23. Genetic Linkage: Definition & Analysis

Genetic linkage is a key principle in understanding the inheritance of traits. Why do some characteristics always seem to occur together? Dive into this lesson to see exactly what it means for genes to be linked.

Genetic Linkage: Problems, Mapping & Studies

24. Genetic Linkage: Problems, Mapping & Studies

In this lesson, we'll discuss what happens when genes don't assort randomly. We'll then discuss how to calculate this non-randomness. It's easier than you might think!

Gregor Mendel: Biography, Facts & Timeline

25. Gregor Mendel: Biography, Facts & Timeline

Have you ever wondered how you ended up with eyes like your mother and a nose like your father? Gregor Mendel wondered about inherited traits too over a century ago. In this lesson, you will learn about Gregor Mendel and the important contributions he made to the field of genetics.

Heritability Coefficient

26. Heritability Coefficient

Heritability is a measure of how much of the variation you see in a certain trait can be attributed to genetic variation. In this lesson, we will discuss what heritability means and how it is calculated.

Heritability of Intelligence

27. Heritability of Intelligence

If you are intelligent and have children with someone who is intelligent, will your kids be smart? In this lesson, we will examine the aspects of intelligence that seem to be passed down through the generations, as well as how life experiences play a part.

Heritable Characteristics & Diseases

28. Heritable Characteristics & Diseases

Have you ever wondered how traits are passed on from one generation to the next? In this lesson we will discuss this process, as well as some specific traits and diseases that can be passed from parent to offspring.

Holandric Genes: Traits & Inheritance

29. Holandric Genes: Traits & Inheritance

Have you even wondered why only men have hairy ears or certain forms of color blindness? In this lesson you will learn about holandric genes on the Y chromosome and how they are passed from one generation to the next.

Mendelian & Non-Mendelian Traits in Humans: Definition & List

30. Mendelian & Non-Mendelian Traits in Humans: Definition & List

Mendelian traits are physical characteristics passed down from parents based on dominant and recessive alleles. This lesson will go into more detail about what Mendelian and non-Mendelian traits are and how they are passed down through generations with examples of each.

The Differences Between Primary & Secondary Succession

31. The Differences Between Primary & Secondary Succession

In this lesson you will learn about the differences between primary and secondary succession. You will also discover how and why each process occurs as well as their importance to the survival of a habitat.

Recessive Epistasis: Definition, Examples & Causes

32. Recessive Epistasis: Definition, Examples & Causes

In this lesson, we will discuss how genetics gets a lot messier than what you may have seen in high school biology. One type of this messiness comes from epistatic genes. What do epistatic genes have to do with Labrador retriever puppies?

Specific vs. Non-Specific Immunity

33. Specific vs. Non-Specific Immunity

This lesson is on specific and non-specific immunity. Here, we'll go over what your immune system is and what it does. We will also explain the two parts of the immune system, specific and non-specific.

Difference Between Genes & Alleles

34. Difference Between Genes & Alleles

Genes are passed from parent to child. Each parent provides one variation of the gene, called an allele, to the child. This lesson will discuss how genetic information is inherited and how it is expressed.

Heterochromia: Definition & Causes

35. Heterochromia: Definition & Causes

Have you ever seen a dog or cat with two differently colored eyes? This is called heterochromia. Read this lesson to learn more about this fascinating condition and how heterochromia happens!

Chapter Practice Exam
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Practice Final Exam
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