About This Chapter
Genetics Overview - Chapter Summary
This informative chapter covers the basics of the study of genetics, including types of reproduction, the structure of a gene and how heredity works. Our short video lessons are accompanied by multiple-choice quizzes that make great test preparation tools. To make quick study guides, our printable lesson transcripts cover the important keywords and subjects you need to know. After reviewing these lessons, you will be able to:
- Define gene
- Tell how sexual and asexual reproduction differ
- Detail the processes of mitosis and meiosis
- Define phenotype
- Show how traits are inherited
- Describe some genetic disorders
- Explain what DNA is
- Differentiate between RNA, DNA and types of RNA
- Outline genetic variability and random mutation
1. Asexual vs. Sexual Reproduction: Comparison & Characteristics
Did you know that some organisms can reproduce without a mate? Check out this video lesson on asexual versus sexual reproduction to discover the different ways organisms can reproduce and the main differences between mitosis and meiosis.
2. What Is a Gene? - Definition & Structure
Genes are little codes found in our cells that make up who we are. This lesson covers where genes are located, how we get our genes, and the functions of genes.
3. What is Mitosis? - Definition, Stages & Function
Every day your body cells are dividing using a process called mitosis. This allows you to grow and replace damaged or worn out cells. Learn about the stages of mitosis: prophase, metaphase, anaphase and telophase.
4. What is Meiosis? - Steps & Results
It's meiosis that gives us the male and female reproductive cells known as the egg and sperm. In meiosis, two cell divisions take place, which produces four genetically unique cells with half the number of chromosomes as the parent cell.
5. What Is a Phenotype? - Definition & Example
Do you have blue eyes or brown eyes, or something else, like hazel? That's your phenotype for eye color. Discover examples of phenotypes, and how they are (partly) determined by your genes.
6. Genetics and Punnett Squares: Getting Traits from Parents
You are the genetic product of your parents, but you could have ended up differently if they had passed on different genetic information to you. Punnett squares are a useful tool to help us identify all the possible genotypes of the offspring of two parents.
7. What are Genetic Disorders? - Definitions & Descriptions
This lesson defines genetic disorders and explores three main types of genetic disorders, including monogenetic disorders, chromosome disorders, and multifactorial inheritance disorders. You'll learn about genes, chromosomes, DNA, and much more!
8. What is DNA?
In this lesson, we will learn what DNA is, what its characteristics and functions are, even where it is located and what information it contains. We'll also learn how the double helix is created. Find out more.
9. Differences Between RNA and DNA & Types of RNA (mRNA, tRNA & rRNA)
In this lesson, you'll explore RNA structure and learn the central dogma of molecular biology. Along the way, you'll meet the three types of RNA and see how the cell uses them most effectively.
10. Genetic Variability, Random Mutation & Artificial Selection
In this lesson we will discuss the importance of genetic variability and the role of random mutations. We will also compare the processes of natural and artificial selection.
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Other chapters within the 7th Grade Science: Life Science course