Ch 34: Praxis General Science: Basic Genetics

About This Chapter

In this chapter, you can brush up on your knowledge of basic genetics by exploring short video lessons. Review Mendel's laws, human genetics research methods, genetic disorders and more as you study for the Praxis General Science assessment.

Praxis General Science: Basic Genetics - Chapter Summary

Enjoy this in-depth look at the basic genetics as you prepare for questions on the Praxis General Science assessment. Upon completion of this chapter, you will be prepared for the following:

  • Understanding the basics of genetics and properties of alleles
  • Describing Mendel's First and Second Laws
  • Listing exceptions to simple dominance and independent assortment
  • Explaining linkage and crossing over
  • Discussing human genetics and model organisms, as well as human genetics research methods
  • Analyzing genetic disorders, point mutations in DNA and mutagens

The lessons offer a comprehensive overview of basic genetics, providing you with definitions, methods, examples and more to get you ready for the exam. Instructors present the lessons in an engaging manner that makes studying fun.

Praxis General Science: Basic Genetics Chapter Objectives

Topics in this chapter on basics genetics can help you prepare for questions in the life science content category of the Praxis General Science assessment. This category constitutes about 20% of the exam and consists of approximately 27 questions. The assessment tests the knowledge and skills of beginner teachers and ensures they're ready for the licensure needed to teach general science in their states.

The computer-based assessment consists of 135 selected-response questions and has a time limit of 2.5 hours. Get the practice you need by taking short self-assessment quizzes and a chapter exam that offer questions similar in format and content to those on the test. Each lesson offers a full transcript with helpful vocabulary words you can use to deepen your understanding of basic genetics. If you have any questions about lesson topics, feel free to submit them to our experts.

12 Lessons in Chapter 34: Praxis General Science: Basic Genetics
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.

Mendel's Second Law: The Law of Independent Assortment

4. 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.

Exceptions to Simple Dominance: Codominance and Incomplete Dominance

5. 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

6. 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

7. 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

8. 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!

Human Genetics Research Methods: Pedigrees and Population Genetics

9. 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.

Genetic Disorders: Penetrance & Phenotypic Variability

10. Genetic Disorders: Penetrance & Phenotypic Variability

Did you know that sometimes a dominant human genetic condition will skip a generation in a family? It does happen, and some dominant genetic conditions will also have a wide range of phenotypes, sometimes even within the same family. Learn more in this lesson about phenotypic variability!

Point Mutations in DNA: Types, Diseases & Examples

11. Point Mutations in DNA: Types, Diseases & Examples

Did you know that very small changes in DNA sequences called point mutations can have huge impacts on the body? Learn about different types of point mutations and a few of the diseases they can cause in this lesson.

Mutagens: How the Environment Affects Mutation Rates

12. Mutagens: How the Environment Affects Mutation Rates

What causes mutations to occur in living things? How do we avoid mutations? Are mutations always bad? Discover answers to these questions and more in this lesson on mutagens.

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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