About This Chapter
Classical & Molecular Genetics - Chapter Summary
Complete this online study guide chapter at your own pace to refresh your understanding of classical and molecular genetics. The chapter offers simple and engaging lessons that cover fundamental genetics concepts, such as alleles, incomplete dominance, sex-linked traits, gene linkage and mitochondrial inheritance. You'll also take a look at types of genetic disorders and their associated symptoms. By the end of the chapter, you should be equipped to:
- Define the concepts of heredity, chromosomes and genetic traits
- Recognize exceptions to simple dominance and independent assortment
- Describe allele properties
- Discuss the applications of Mendel's first and second law
- Explain the importance of crossing over and gene linkage
- Understand the impacts of mitochondrial and cytoplasmic inheritance
- Recognize the symptoms of several genetic disorders
When you're finished with each lesson, you can take a short quiz to help retain the information. Be sure to take the final chapter exam to ensure your comprehension of these genetics concepts. You can watch these lessons online using any computer or mobile device, and you also have the option of printing out the word-for-word lesson transcripts. Our genetics experts are also happy to answer any questions you may have about the chapter concepts.
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 & 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.
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.
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. Cytoplasmic & Mitochondrial Inheritance: Types & Impacts
Everyone knows that you inherit genetic information from your parents, but did you know there are multiple ways for this to occur? In this lesson, we'll look at extranuclear inheritance and see what this means for passing on DNA.
9. What are Genetic Disorders? - Definitions & Descriptions
This lesson defines genetic disorders and explores three main types of genetic disorders, including monogenetic disorders, chromosome disorders, and multifactorial inheritance disorders. You'll learn about genes, chromosomes, DNA, and much more!
10. Types of Genetic Disorders: Definitions & Symptoms
Cystic fibrosis, Huntington's disease, Tay-Sachs disease, sickle cell disease, Down syndrome, and cancer all have something in common. They are all genetic disorders, and we will discuss why they may occur and what problems they might cause.
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