About This Chapter
How it works:
- Identify the lessons in Glencoe Biology's Complex Inheritance and Human Heredity chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the human heredity topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, re-watch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Pedigrees and population genetics
- Penetrance and phenotypic variability
- Types of genetic disorders
- Codominance and incomplete dominance
- Sex-linked and sex-limited traits
- Polygenic traits
- Genotype-environment interaction
- Phenotypic plasticity
- Segregation and independent assortment
- Physical features of chromosomes
- Nondisjunction and forms of aneuploidy
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1. 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.
2. 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!
3. 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.
4. 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.
5. 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?
6. Epistasis: Definition & Examples
Labradors come in three different colors due to two different genes. In this lesson, find out how epistasis works as one phenotype is controlled by the products from two or more genes.
7. Polygenic Traits: Definition & Examples
If variety is the spice of life, polygenic inheritance is one genetic mechanism giving us a continuous range of possibilities. In this lesson, learn how a polygenic trait, like height, can be controlled by multiple genes.
8. Genotype-Environment Interaction and Phenotypic Plasticity
It's not just what's in your genes. In this lesson, we'll begin to explore how some phenotypes are influenced by the interaction between a genotype and the environment. Further, some organisms rely on phenotypic plasticity to change in response to the environmental changes.
9. The Chromosome Theory of Inheritance: Segregation and Independent Assortment
Mendel proposed the law of segregation and the law of independent assortment to explain the inheritance behind his pea plant traits. A hundred years later, Boveri and Sutton developed the chromosome theory of inheritance, which stated that chromosomes were responsible for the heredity Mendel observed. Learn about these men and their ideas in this lesson.
10. Parts of a Chromosome & Their Roles
Learn all about chromosomes, including the different parts of a chromosome and the types of chromosomes in diploid organisms like humans. Learn the vocab used with chromosomes.
11. Nondisjunction & Aneuploidy: Definition & Examples
Learn why proper chromosome segregation is essential during meiosis. We'll see how having an extra chromosome can lead to Down Syndrome and also examine the consequences of having too few chromosomes. Disruptions to the delicate balance of cell division can have far-reaching effects.
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Other chapters within the Glencoe Biology: Online Textbook Help course
- Glencoe Biology Chapter 1: The Study of Life
- Glencoe Biology Chapter 2: Principles of Ecology
- Glencoe Biology Chapter 3: Communities, Biomes, and Ecosystems
- Glencoe Biology Chapter 4: Population Ecology
- Glencoe Biology Chapter 5: Biodiversity and Conservation
- Glencoe Biology Chapter 6: Chemistry in Biology
- Glencoe Biology Chapter 7: Cellular Structure and Function
- Glencoe Biology Chapter 8: Cellular Energy
- Glencoe Biology Chapter 9: Cellular Reproduction
- Glencoe Biology Chapter 10: Sexual Reproduction and Genetics
- Glencoe Biology Chapter 12: Molecular Genetics
- Glencoe Biology Chapter 13: Genetics and Biotechnology
- Glencoe Biology Chapter 14: The History of Life
- Glencoe Biology Chapter 15: Evolution
- Glencoe Biology Chapter 16: Primate Evolution
- Glencoe Biology Chapter 17: Organizing Life's Diversity
- Glencoe Biology Chapter 18: Bacteria and Viruses
- Glencoe Biology Chapter 19: Protists
- Glencoe Biology Chapter 20: Fungi
- Glencoe Biology Chapter 21: Introduction to Plants
- Glencoe Biology Chapter 22: Plant Structure and Function
- Glencoe Biology Chapter 23: Reproduction in Plants
- Glencoe Biology Chapter 24: Introduction to Animals
- Glencoe Biology Chapter 25: Worms and Mollusks
- Glencoe Biology Chapter 26: Arthropods
- Glencoe Biology Chapter 27: Echinoderms and Invertebrate Chordates
- Glencoe Biology Chapter 28: Fishes and Amphibians
- Glencoe Biology Chapter 31: Animal Behavior
- Glencoe Biology Chapter 32: Integumentary, Skeletal, and Muscular Systems
- Glencoe Biology Chapter 33: Nervous System
- Glencoe Biology Chapter 34: Circulatory, Respiratory, and Excretory Systems
- Glencoe Biology Chapter 35: Digestive and Endocrine Systems
- Glencoe Biology Chapter 36: Human Reproduction and Development
- Glencoe Biology Chapter 37: The Immune System