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Ch 27: Praxis Middle School Science: Basic Genetics

About This Chapter

Let us help you review the essentials of genetics in preparation for the Praxis Middle School Science test. Our video lessons and self-assessment quizzes provide the information you need to feel confident about basic genetics.

Praxis Middle School Science: Basic Genetics - Chapter Summary

In our video lessons, expert instructors walk you through the important concepts related to basic genetics that you may encounter on the Praxis Middle School Science test. The videos ensure you'll be able to do the following:

  • Identify the characteristics and properties of alleles
  • Define and apply Mendel's first and second laws
  • Explain what DNA is and how it replicates
  • Examine RNA, the transcription of mRNA from DNA and the translation of mRNA to protein
  • Understand DNA mutations and genetic abnormalities in humans

The lessons have been created to be brief but thorough and engaging. Each lesson is followed by a short multiple-choice quiz so you can gauge your comprehension and retention of the material and go back over any problem areas.

9 Lessons in Chapter 27: Praxis Middle School Science: Basic Genetics
Test your knowledge with a 30-question chapter practice test
What is DNA?

1. What is DNA?

In this lesson, we will learn what DNA is, what its characteristics and functions are, even where it is located and what information it contains. We'll also learn how the double helix is created. Find out more.

How Does DNA Replicate?

2. How Does DNA Replicate?

In this lesson, we will learn why DNA replicates as well as how. We'll also learn about the rates of replication and how DNA proofreads itself. After watching the lesson, you can complete a short quiz to test your knowledge.

Transcription of Messenger RNA (mRNA) from DNA

3. Transcription of Messenger RNA (mRNA) from DNA

In this lesson, you will gain a thorough understanding of how transcription works. We will investigate how DNA is transcribed into RNA with the help of a promoter and RNA polymerase. Learn the purpose of messenger RNA and explore the three phases of transcription.

Translation of mRNA to Protein: Initiation, Elongation & Termination Steps

4. Translation of mRNA to Protein: Initiation, Elongation & Termination Steps

Translation, the second part of the central dogma of molecular biology, describes how the genetic code is used to make amino acid chains. In this lesson, explore the mechanics involved in polypeptide synthesis. Learn the three major steps of translation as you watch tRNA, mRNA, and ribosomes go to work.

Properties of Alleles

5. 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 & Its Application

6. Mendel's First Law & Its Application

Genetics is a fascinating and confusing world. This lesson will delve into Gregor Mendel's First Law, or the Law of Segregation, explaining what it means and how you can use it.

Mendel's Second Law & Its Application

7. Mendel's Second Law & Its Application

In this lesson, we'll explore how genes can assort independently according to Mendel's second law. We'll also use Punnett squares to see whether or not genes are linked and how this relates to research.

Mutations: When DNA Is Copied Wrong

8. 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.

Genetic Abnormalities in Human Growth and Development

9. 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.

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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