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Ch 9: Genetic Variability & Mutation for the MCAT: Tutoring Solution

About This Chapter

The Genetic Variability and Mutation chapter of this MCAT Prep Tutoring Solution is a flexible and affordable path to learning about genetic variability and mutation. These simple and fun video lessons are each about five minutes long and they teach information involving genetic variability and mutation required for the MCAT exam.

How it works:

  • Begin your review or other MCAT preparation work.
  • Identify the genetic variability and mutation concepts that you're stuck on.
  • Find fun videos on the topics you need to understand.
  • Press play, watch and learn!
  • Complete the quizzes to test your understanding.
  • As needed, submit a question to one of our instructors for personalized support.

Who's it for?

This chapter of our MCAT Tutoring Solution will benefit any student who is trying to learn about genetic variability and mutation and prepare for the exam. This resource can help students including those who:

  • Struggle with understanding meiosis, mitosis, sex determination, mutagens, chromosomal rearrangements or any other genetic variability and mutation topic
  • Have limited time for studying
  • Want a cost effective way to supplement their MCAT preparation
  • Prefer learning science visually
  • Find themselves struggling with genetic variability and mutation
  • Cope with ADD or ADHD
  • Want to get ahead in preparing for the MCAT
  • Need access to MCAT review materials

Why it works:

  • Engaging Tutors: We make preparing for the MCAT exam simple and fun.
  • Cost Efficient: For less than 20% of the cost of a private tutor, you'll have unlimited access 24/7.
  • Consistent High Quality: Unlike a live MCAT prep tutor, these video lessons are thoroughly reviewed.
  • Convenient: Imagine a tutor as portable as your laptop, tablet or smartphone. Review genetic variability and mutation on the go!
  • Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.

Learning objectives

  • Identify the differences between meiosis and mitosis.
  • Explain how the chromosome theory of inheritance works.
  • Understand the roles of Barr bodies and X-inactivation in sex determination.
  • Describe how cytoplasmic and mitochondrial inheritances differ from each other.
  • Discuss the impact of the environment on mutation rates.
  • Summarize the effects of frameshift and point mutations.
  • Study the genetic risk factors that can lead to cancer.
  • Define chromosomal rearrangements and inborn errors of metabolism.

14 Lessons in Chapter 9: Genetic Variability & Mutation for the MCAT: Tutoring Solution
Test your knowledge with a 30-question chapter practice test
How Meiosis & Fertilization Promote Genetic Variation

1. How Meiosis & Fertilization Promote Genetic Variation

Individuals are different because of their genetic variation. Even two siblings who come from the same parents have different genetic make-ups. This variation comes from both meiosis and fertilization, which are components of sexual reproduction.

The Chromosome Theory of Inheritance: Segregation and Independent Assortment

2. 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.

Sex Determination, X-Inactivation, and Barr Bodies

3. Sex Determination, X-Inactivation, and Barr Bodies

Sex determination, X-inactivation and Barr bodies are complex chromosomal processes. Learn more about each of these processes and test your knowledge with a quiz.

Cytoplasmic & Mitochondrial Inheritance: Types & Impacts

4. 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.

Mutagens: How the Environment Affects Mutation Rates

5. Mutagens: How the Environment Affects Mutation Rates

What causes mutations to occur in living things? How do we avoid mutations? Are mutations always bad? Discover answers to these questions and more in this lesson on mutagens.

Effects of Frameshift Mutations: Definitions and Examples

6. Effects of Frameshift Mutations: Definitions and Examples

What is a frameshift in genetic translation? How can a frameshift mutation change a protein? In this lesson, learn about the codon reading frame and how frameshift mutations cause serious problems for polypeptide formation.

Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

7. Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

How does a tiny point mutation change the way a protein works? What are the consequences of base substitutions? In this lesson, we'll use an imaginary creature to explore missense, nonsense and silent mutations.

What is a Point Mutation? - Definition, Causes & Types

8. What is a Point Mutation? - Definition, Causes & Types

What are genetic mutations? How do they affect our DNA? This lesson covers the basics of point mutations and provides simple examples of different mutation types.

Cancer Syndromes & Genetic Risk Factors for Cancer

9. Cancer Syndromes & Genetic Risk Factors for Cancer

This lesson describes something called cancer syndrome or family cancer syndrome, as well as the important clues that can help it be detected and two examples of such a condition.

Chromosomal Rearrangement

10. Chromosomal Rearrangement

Have you ever switched out one thing for another or traded places with someone? Our chromosomes can do this, too. This lesson tells you how as we go over chromosomal rearrangements!

Genetic Variability and Random Mutation

11. 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.

What Are Inborn Errors of Metabolism?

12. What Are Inborn Errors of Metabolism?

Inborn errors of metabolism are genetic disorders that affect the metabolism of food components. Many of these disorders are difficult to diagnose but must be caught early in order to be treated. Learn about a common disorder, phenylketonuria.

Genetic Drift: Definition, Examples & Types

13. Genetic Drift: Definition, Examples & Types

Genetic drift reduces genetic variability of a population by decreasing the size of the population. The change in population size and variability often leads to new species and unique populations.

Synapsis & Crossing Over in Meiosis

14. Synapsis & Crossing Over in Meiosis

This lesson will cover synapsis and crossing over that occur during the process of meiosis. We'll look at exactly when these occur and how they can lead to greater genetic diversity.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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