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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Problem 6

Textbook Question

At metaphase of mitosis, .a. the chromosomes are condensed and found at the poles;b. the chromosomes are composed of one sister chromatid;c. cytokinesis begins;d. the chromosomes are composed of two sister chromatids and are lined up along the equator of the cell

Verified step by step guidance

Step 1: Understand the stages of mitosis. Mitosis is a process of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus. It is divided into several stages: prophase, metaphase, anaphase, and telophase.

Step 2: Identify the characteristics of each stage. During prophase, the chromosomes condense and become visible. During metaphase, the chromosomes align at the equator of the cell. During anaphase, the sister chromatids separate and move towards the poles. During telophase, the chromosomes decondense and the nuclear envelope reforms.

Step 3: Analyze the given options. Option a suggests that the chromosomes are at the poles during metaphase, which is incorrect. This happens during anaphase. Option b suggests that the chromosomes are composed of one sister chromatid, which is incorrect. Each chromosome is composed of two sister chromatids during metaphase. Option c suggests that cytokinesis begins during metaphase, which is incorrect. Cytokinesis usually begins during anaphase or telophase.

Step 4: Based on the analysis, option d is the correct answer. During metaphase, the chromosomes are composed of two sister chromatids and are lined up along the equator of the cell.

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Key Concepts

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

Mitosis

Mitosis is the process of cell division that results in two genetically identical daughter cells. It consists of several stages: prophase, metaphase, anaphase, and telophase. During metaphase, chromosomes align at the cell's equatorial plane, ensuring that each daughter cell will receive an identical set of chromosomes.

Chromatids

Chromatids are the two identical halves of a replicated chromosome, joined together at a region called the centromere. During metaphase, each chromosome consists of two sister chromatids, which are crucial for accurate segregation during cell division. This ensures that each daughter cell receives the correct number of chromosomes.

Cytokinesis

Cytokinesis is the final step of cell division, occurring after mitosis, where the cytoplasm of a parental cell is divided into two daughter cells. It typically begins during telophase and involves the formation of a cleavage furrow in animal cells or a cell plate in plant cells. It is essential for completing the cell division process and ensuring that each daughter cell is a separate entity.