About This Chapter
Heredity and Genetics - Chapter Summary
In this chapter, get a comprehensive review of genetics and the process of heredity. Explore Mendel's laws, sex-linked traits and more. After completing the lessons, you'll have a better understanding of:
- Genetics as a whole
- Applications of the Law of Segregation and the Law of Independent Assortment
- Various types of genetic dominance
- Sex-linked and sex-limited traits
- Linking chromosomes and crossing over
- Chi-square tests
- Using model organisms to understand human genetics
Our instructors have specially developed these lessons to provide you with several methods for learning. You'll enjoy engaging videos that help explain the topics. You can take quizzes as you make your way through the chapter to test your knowledge of the material. After completing the lessons, you can take a final chapter exam to see how well you've absorbed the information.
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. 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.
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.
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!
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.
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?
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.
10. The Chi-Square Test
What if you expect one thing, but get another? The chi-square test is a method of statistical analysis that can help us identify if the results from a genetic cross are simply due to chance, or if something else is happening. Learn about the chi-square test in this lesson.
11. 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!
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Other chapters within the STAAR Biology: Test Prep & Practice course
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- Cell Communication
- Basics of Metabolic Biochemistry
- Overview of Cell Division
- Basics of DNA & RNA
- Process of DNA Replication
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- Physiology I: The Circulatory, Respiratory, Digestive, Excretory, and Musculoskeletal Systems
- The Nervous, Immune, and Endocrine Systems
- Animal Reproduction and Development
- Gene Mutations
- DNA and Technology
- The Origin and History of Life On Earth
- The Theory of Evolution
- Natural and Artificial Selection
- Population Evolution
- Organism Classification & Phylogenesis
- Ecological Systems and the Environment
- Ecological Relationships and Species Populations
- Humans and the Environment
- Lab Safety Equipment and Procedures
- Methods of Scientific Research
- Analyzing and Interpreting Scientific Data
- Famous Biologists and Their Impact on Society
- About the STARR Tests
- STAAR Biology Flashcards