About This Chapter
Who's it for?
Anyone who needs help learning or mastering high school biology material will benefit from taking this course. There is no faster or easier way to learn biology. Among those who would benefit are:
- Students who have fallen behind in understanding the cell cycle and cell division
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about cell division
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the cell division chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the cell division chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any cell division question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a cell division unit of a standard high school biology course. Topics covered include:
- Aneuploidy and nondisjunction
1. The Genome
There are approximately 3 billion bases in the human genome. In this lesson, you'll learn more about the genome and its organization into chromosomes. We think about DNA often as the blueprint for life, but we can also think of it as the recipe for life with the nucleus being the library.
2. The Structure of Chromosomes
Explore the structure of chromosomes and see how DNA fits inside the nucleus of the cell. In this lesson, you'll learn about histones, chromatin and nucleosomes.
3. The Cell Cycle
Learn about the dividing and non-dividing states of the cell and discover the different phases of the cell cycle, including interphase, cytokinesis, and the stages of cell division.
4. DNA Packaging and Chromosome Condensation
Learn how DNA packaging makes it possible to fit approximately seven feet of DNA inside a single cell. You'll see how chromosome condensation helps cells get ready for cell division.
5. Physical Features of a Chromosome
Learn all about chromosomes, including the different parts of a chromosome and the types of chromosomes in diploid organisms like humans. Learn the vocab used with chromosomes.
6. Mitosis I: The Mitotic Spindle
Condensation makes DNA ready / And microtubules hold it steady / A microtubule's a fancy rope / To move the DNA is the hope / From spindle poles they do extend / To align each chromosome in the end
7. Mitosis II: Phases of Chromosome Segregation
Let's take a second look at mitosis and focus on the phases of chromosome segregation. As we concentrate on chromosomes, you'll learn the tricky dance that takes place through all five phases of mitosis.
8. Cytokinesis: Animal Versus Plant Cells
What's a cell to do when it must divide in two? We'll explore cytokinesis and see how the process can differ in important ways when it comes to plant versus animal cells.
9. Asexual Versus Sexual Reproduction
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.
10. Overview of Meiosis
Welcome to meiosis, a realm of division doubled for reproduction untroubled. You'll get a preview of both divisions of meiosis and see what it takes to go from a diploid cell to a haploid gamete.
11. Meiosis I: Reductional Cell Division
How does meiosis keep track of homologs and reduce the genome by half? Know these answers and more as we navigate the steps of meiosis I. This lesson will be tetradical!
12. Meiosis II: Equational Cell Division
Behold round two of meiotic cell division! You'll see how meiosis II keeps the genome intact and gives the final push to produce haploid gametes, which make the world go round.
13. Nondisjunction and Aneuploidy
Learn why proper chromosome segregation is essential during meiosis. We'll see how having an extra chromosome can lead to Down Syndrome and also examine the consequences of having too few chromosomes. Disruptions to the delicate balance of cell division can have far-reaching effects.
14. Nondisjunction in Meiosis: Definition & Examples
Nondisjunction during meiosis produces eggs or sperm cells that don't have the normal number of chromosomes. In this lesson, learn about the process of nondisjunction and problems it can cause in humans.
15. Anaphase: Definition & Concept
Anaphase is a very important stage of cell division. In this lesson, you can lean about the process of anaphase and what happens if something goes wrong during it.
16. Karyotype: Definition, Disorders & Analysis
Some people with chromosomal disorders may have too many or too few chromosomes in their cells. A karyotype analysis can be used to look at the number and appearance of chromosomes in individuals. Keep reading to learn more.
17. Kinetochore: Definition & Structure
Kinetochores play an important role in cells, especially during cell division. In this lesson, we will not only take a look at what kinetochores are, but we will also investigate what they do.
18. Telophase: Definition & Explanation
The stages of mitosis - that process that allows cells to divide and reproduce - are detailed and complex. Learn about the ins and outs of telophase, the final step of mitosis. Learn also about telophase I and telophase II, the final stages of each half of meiosis.
19. What is the Human Genome Project? - Definition, Purpose & Benefits
We often hear about scientific research being done but may not truly understand what that entails. This is not one of those times. The Human Genome Project has allowed many breakthroughs in genetic research that affect us in a very tangible way, right here, right now.
20. Division of a Cell Nucleus
How do cells replicate themselves? How do they copy their DNA into new cells? In this lesson, we will explore the division of a cell nucleus. Test your knowledge after the lesson with a quiz.
21. Eukaryotic Cell Division
This lesson is on eukaryotic cell division. Read on to learn which type of cells are eukaryotic and what the similarities and differences in cell division are for each type, then check your knowledge with a quiz.
22. Types of Cell Division
How do cells divide? Do they all divide in the same manner? This lesson answers those questions through an investigation into the three types of cell division: mitosis, meiosis and binary fission.
23. Importance of Mitotic Cell Division
This lesson is on the importance of mitotic cell division. In this lesson, we'll go over what mitotic cell division is and what cells use this process. We'll also cover the main functions of cell division.
24. What Controls Cell Division?
One cell can divide to create two new cells. During its life cycle, a cell will pass through several checkpoints that tell it whether it can continue dividing or whether it needs to stop. These checkpoints ensure cells stay healthy when they replicate.
25. What is Cell Division?
This lesson is on cell division. We'll learn what cell division is and how the process differs between bacteria, plant, animal and fungal cells. Then test your knowledge with a brief quiz.
26. What Limits Cell Division?
In this lesson we'll go over what cell division is in different types of cells and look at the factors that stop cells from dividing. We'll also learn what happens when cell division doesn't stop.
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