About This Chapter
Biology of Genetics - Chapter Summary
Expert instructors in this chapter have created fun lessons you can access in a secure online environment to get a better understanding of the biology of genetics. Skip the traditional classroom setting and learn from home or on-the-go about chromosomal linkage, complimentary base pairing, the properties of alleles and much more. Once you've completed this chapter, you will be able to:
- Explain the basics of genetics
- Define Mendel's first law and discuss its application
- Share the meaning and discuss the application of Mendel's second law
- List exceptions to simple dominance and independent assortment
- Discuss human genetics and model organisms
This online chapter makes it easy to study the biology of genetics your way. Access lessons anytime and from any location with an Internet connection to enhance your comprehension of the subject area at a comfortable pace. Use the mini lesson quizzes and chapter exam to assess your knowledge and gauge your readiness to take your test. Clarify any topics you don't fully understand by submitting your questions 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 & 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: 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. 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!
6. 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.
7. 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?
8. 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.
9. 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!
10. Complementary Base Pairing: Definition & Explanation
Explore the composition and structure of DNA molecules. Learn how DNA molecules are composed of four different types of nucleotides that pair with each other in a very specific, complementary manner.
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