Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Phases of Mitosis

Anatomy & Physiology

3. Energy & Cell Processes

Phases of Mitosis

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1: minutes

Problem 9

Textbook Question

VISUAL SKILLS The light micrograph shows dividing cells near the tip of an onion root. Identify a cell in each of the following stages: prophase, prometaphase, metaphase, anaphase, and telophase. Describe the major events occurring at each stage.

Verified step by step guidance

Identify a cell in prophase: Look for a cell where the chromatin is condensing into visible chromosomes, and the nucleolus is disappearing.

Identify a cell in prometaphase: Find a cell where the nuclear envelope has broken down, and spindle fibers are attaching to the kinetochores of chromosomes.

Identify a cell in metaphase: Look for a cell where the chromosomes are aligned at the metaphase plate, equidistant from the two spindle poles.

Identify a cell in anaphase: Find a cell where the sister chromatids are being pulled apart toward opposite poles of the cell.

Identify a cell in telophase: Look for a cell where the chromosomes have reached the poles, and the nuclear envelope is reforming around each set of chromosomes, with the cell beginning to divide.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cell Cycle Stages

The cell cycle consists of several stages that a cell goes through to divide and replicate. These stages include interphase (where the cell prepares for division) and the mitotic phase, which is further divided into prophase, prometaphase, metaphase, anaphase, and telophase. Understanding these stages is crucial for identifying the specific characteristics and events that occur during cell division.

Mitosis

Mitosis is the process of nuclear division that results in two genetically identical daughter cells. It is divided into five stages: prophase (chromosomes condense), prometaphase (nuclear envelope breaks down), metaphase (chromosomes align at the equatorial plane), anaphase (sister chromatids separate), and telophase (nuclear membranes reform). Each stage has distinct events that are essential for proper cell division.

Chromosome Behavior

During mitosis, chromosomes undergo specific behaviors that are critical for accurate segregation. In prophase, chromosomes become visible as they condense. In metaphase, they align at the cell's equator, and during anaphase, the sister chromatids are pulled apart to opposite poles. Understanding these behaviors helps in identifying the stages of mitosis in the light micrograph of dividing cells.