About This Chapter
Genetic Variability & Analytic Methods - Chapter Summary
While going through these lessons, you will deepen your understanding of genetic variability and analytic methods. This self-paced chapter reviews the Hardy Weinberg Equilibrium, natural selection, gene flow, and more. After going through the lessons, you should be ready to:
- Explain how gene pools change
- Discuss how random mutations help a population adapt to unexpected changes
- Describe the mechanisms behind microevolution that cause changes in allele frequencies
- Recall the definition of bottleneck effect
- Discuss different evolutionary agents of the Hardy Weinberg Equilibrium
- Explain how to use a testcross to analyze genetics
These lessons on genetic variability and analytic methods can help you quickly get up to speed on the concepts covered. While going through the lessons, you will notice that the vocabulary words are highlighted in bold for quick reference. If you happen to get stuck on a topic, you can use the Help feature to submit questions to instructors. For those who prefer text-based learning, each lesson includes a full written transcript.
1. What is a Gene Pool? - Definition & Example
Your genes + everybody else's genes = the human gene pool. Learn about gene pools large and small, including how they can change and why they're more than meets the eye!
2. Genetic Variability and Random Mutation
Evolution is driven by variation among populations. The amount of variability determines how well a population can adapt to environmental changes, while random mutations can provide new variations that help a population adapt to unexpected changes.
3. Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift
Environments are dynamic, which causes populations to be as well. In this lesson, you'll learn about microevolution, as well as the mechanisms behind it that cause changes in allele frequencies within populations.
4. Bottleneck Effect: Definition & Example
In this lesson, you will learn what the bottleneck effect is and how it affects populations, read about some examples of the bottleneck effect, and even have a chance to ponder jelly beans.
5. Hardy-Weinberg Equilibrium I: Overview
In this lesson, we'll examine population genetics in greater detail. We'll also explore notions of Hardy-Weinberg equilibrium for large, stable populations. Is the genetic makeup of our flying hamster population changing? The Hardy-Weinberg equilibrium can serve as a reference point as we try to answer population genetics questions.
6. Hardy-Weinberg Equilibrium II: The Equation
The Hardy-Weinberg equilibrium equation is represented by a polynomial, so we'll have to do some calculations. Don't be intimidated; a few coin tosses can help us make sense of allelic frequencies in a given gene pool.
7. Hardy-Weinberg Equilibrium III: Evolutionary Agents
In this lesson, you'll learn how the Hardy-Weinberg equation relates to different evolutionary agents and population changes. Discover how the equation may be used to discover populations that are not in equilibrium.
8. Analyzing Genetics With a Testcross
Genetic experiments can get pretty complicated. Sometime you just need a simple, reliable method for testing genetics, and that's where the testcross comes in handy. In this lesson we will look at what this is and how to use it.
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Other chapters within the Alberta Education Diploma - Biology 30: Exam Prep & Study Guide course
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- Chromosomes & Sex Characteristics
- Early Development to Childbirth in Humans
- Mitosis & Meiosis Overview
- Chromosomes & Chromosome Disorders
- Genotypes & Phenotypes
- Genomes, Genes & Alleles
- Genetic Inheritance & Pedigrees
- DNA Sequencing & Replication
- Transcription & Translation in DNA & RNA
- Ecology, Ecosystems & the Environment
- Population Change in Biology
- Alberta Education Diploma - Biology 30 Flashcards