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Ch 18: TExES Life Science: Genetics & Heredity

About This Chapter

Using our video lessons and the practice quizzes in this chapter will have you well prepared for questions about genetics and heredity on the TExES Life Science test. Study topics such as Mendel's laws and dominant and recessive traits as you get ready for exam day.

TExES Life Science: Genetics & Heredity - Chapter Summary

If you plan to take the TExES Life Science test and you need some help reviewing genetics and heredity, you've come to the right place. Our instructors are science experts and they've put together video lessons in this chapter to help you review the essentials of genetics. These videos are brief so you can easily fit them into breaks throughout your day. If you need help, just contact our instructors. Their lessons will go through topics like:

  • Properties and role of alleles
  • Mendel's first and second laws and their exceptions
  • Linkage and crossing over of chromosomes
  • Model organisms
  • Research methods used in human genetics

Before proceeding to the next lesson, be sure to take the short practice quizzes so you know you're retaining the information. You can re-watch any videos if you need. They're easy to navigate so you can skip any parts you don't want to review.

Objectives for the TExES Life Science: Genetics & Heredity Chapter

Texas State uses the TExES Life Science test as part of their teacher certification and endorsement requirements. It is a computer-administered test of about 100 multiple-choice questions. The test is sub-divided into six domains. You'll have about 5 hours to complete them all. The third domain, Heredity and Evolution, is where most of the genetics and heredity questions will be. Worth 20% of the exam score, this section will assess, among other objectives, your ability to apply Mendel's laws and compare meiosis and mitosis. You'll display your knowledge of asexual and sexual reproduction, in both plants and animals, showcase your capacity to recognize the factors that influence gene transmission (e.g. linkage, crossing-over, etc), and express the ways in which genotype and environmental factors influence phenotype and expression.

9 Lessons in Chapter 18: TExES Life Science: Genetics & Heredity
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 & Its Application

3. 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

4. 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.

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.

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.
Not Taken

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