About This Chapter
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.
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.
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.
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.
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.
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.
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?
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.
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!
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.
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!
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.
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.
Earning College Credit
Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.
To learn more, visit our Earning Credit Page
Transferring credit to the school of your choice
Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.
Other chapters within the Praxis General Science (5435): Practice & Study Guide course
- Praxis General Science: Methodology, Techniques & History
- Praxis General Science: Matter
- Praxis General Science: Energy
- Praxis General Science: Atomic Structure
- Praxis General Science: Radioactivity
- Praxis General Science: Thermodynamics
- Praxis General Science: Periodicity
- Praxis General Science: Gases
- Praxis General Science: Bonding & Structure
- Praxis General Science: Chemical Reactions
- Praxis General Science: Chemical Kinetics
- Praxis General Science: Chemical Reaction Equilibrium
- Praxis General Science: Oxidation Reduction
- Praxis General Science: Acid-Base Chemistry
- Praxis General Science: Solutions & Solubility
- Praxis General Science: Mechanics
- Praxis General Science: Newton's Laws & Motion in Physics
- Praxis General Science: Linear & Angular Momentum
- Praxis General Science: Oscillations
- Praxis General Science: Laws of Gravitation
- Praxis General Science: Work, Energy & Power
- Praxis General Science: Fluid Mechanics
- Praxis General Science: Magnetism & Electricity
- Praxis General Science: Electrical Forces & Fields
- Praxis General Science: Potential & Capacitance
- Praxis General Science: Optics & Waves
- Praxis General Science: Cell Biology
- Praxis General Science: Prokaryotic Cells
- Praxis General Science: Protists, Fungi & Viruses
- Praxis General Science: Plant Cells
- Praxis General Science: The Transcription & Translation Process
- Praxis General Science: Cell Reproduction & Division
- Praxis General Science: Basic Biochemistry of Life
- Praxis General Science: DNA Replication
- Praxis General Science: Theory & Key Mechanisms of Evolution
- Praxis General Science: Hierarchical Classification Scheme
- Praxis General Science: Plant Structures & Functions
- Praxis General Science: Human Body Systems
- Praxis General Science: Human Reproductive Systems & Development
- Praxis General Science: Key Aspects of Ecology
- Praxis General Science: Minerals & Rocks
- Praxis General Science: Earth's Structure & Internal Processes
- Praxis General Science: Changing Earth's Surfaces
- Praxis General Science: Historical Geology
- Praxis General Science: Earth's Bodies of Water
- Praxis General Science: Meteorology & Climate
- Praxis General Science: Astronomy
- Praxis General Science: Science, Technology & Society
- Praxis General Science Flashcards