About This Chapter
Genetic Mutations - Chapter Summary and Learning Objectives
Every information system has its imperfections or glitches that occasionally arise, and you will soon understand more about that as you study this chapter covering genetic mutations. As you might already know, mutations in human DNA can lead to health problems or birth defects. However, not every DNA strand that experiences a mutation will end up causing problems because the body has ways of correcting some mutations. In these lessons, you'll learn about mutations and their effects on DNA and protein function. You'll look at the mechanisms of mutation and the types of point mutations that can occur. Our lessons will introduce you to an array of topics related to mutations in the genes, such as:
- The basic causes of mutations
- How mutations occur
- What happens when a mutation occurs
- How mutations can be avoided or prevented
- How the body may naturally repair a mutation
|Point Mutations: Base Substitutions, Insertions, and Deletions||See what genetic mutations are and how they affect DNA.|
|Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations||Study how missense, nonsense and silent mutations arise from base substitutions.|
|The Effects of Frameshift Mutations: Definitions and Examples||Explore how frameshift mutations arise from insertions and deletions.|
|Mutagens: How the Environment Affects Mutation Rates||Examine how DNA polymerase corrects mistakes and how exposure to mutagens in our environment can be reduced.|
1. 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.
2. 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.
3. 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.
4. 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.
5. Point Mutations in DNA: Types, Diseases & Examples
Did you know that very small changes in DNA sequences called point mutations can have huge impacts on the body? Learn about different types of point mutations and a few of the diseases they can cause in this lesson.
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Other chapters within the Biology 101: Intro to Biology course
- Basic Terms & Skills in Biological Science
- Inorganic Chemistry Review for Biology
- Introduction to Organic Molecules & Heterotrophs
- The Nucleotide Structure of DNA & RNA
- Enzyme Function, Interactions & Regulation
- Cell Membrane Model, Components & Transport
- Cell Structure, Organelles & Organelle Functions
- Cellular Metabolism & Respiration
- Processes & Steps of DNA Replication
- Transcription, Translation & Protein Synthesis
- Cell Growth & The Process of Cell Division
- Cellular Structure & Processes in Bacteria & Protists
- Botany: Life Processes in Plants
- The Musculoskeletal, Circulatory, Respiratory, Digestive & Excretory Systems
- The Nervous System & Endocrine System
- Reproduction, Development & Survival in Animals
- Mendelian Genetics & Mechanisms of Heredity
- Ecology Principles & Community Ecology
- Evolutionary Principles & Natural Selection
- Earth's Timeline & Geological Evolution
- Taxonomic Classification & Phylogeny
- Genetic Engineering & DNA Sequencing
- Studying for Biology 101