Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

11. Cell Division

Phases of Mitosis

General Biology

11. Cell Division

Phases of Mitosis

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0:29 minutes

Problem 7

Textbook Question

Which of the following phases of mitosis is essentially the opposite of prophase in terms of changes within the nucleus?
a. Telophase
b. Metaphase
c. Interphase
d. Anaphase

Verified step by step guidance

Understand the key events of prophase: During prophase, the nuclear envelope breaks down, chromosomes condense and become visible, and the spindle fibers begin to form.

Compare the events of prophase to the phases listed in the options. Look for the phase where the nuclear envelope reforms, chromosomes decondense, and spindle fibers disassemble, as these are opposite changes to prophase.

Recall the characteristics of telophase: In telophase, the nuclear envelope reforms around the separated chromosomes, the chromosomes decondense back into chromatin, and the spindle fibers disassemble.

Eliminate the other options: Metaphase involves the alignment of chromosomes at the metaphase plate, interphase is the phase between cell divisions where the cell grows and DNA replicates, and anaphase involves the separation of sister chromatids.

Conclude that telophase is the phase of mitosis that is essentially the opposite of prophase in terms of changes within the nucleus.

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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 from a single parent cell. It consists of several phases: prophase, metaphase, anaphase, and telophase. Each phase is characterized by specific events that lead to the segregation of chromosomes and the eventual division of the cell's nucleus.

Prophase

Prophase is the first stage of mitosis, where chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down. The mitotic spindle forms, and the centrioles move to opposite poles of the cell. This phase sets the stage for the alignment and separation of chromosomes in the subsequent phases.

Telophase

Telophase is the final stage of mitosis, essentially reversing the changes that occurred during prophase. During telophase, the chromosomes de-condense back into chromatin, the nuclear envelope re-forms around each set of chromosomes, and the spindle apparatus disassembles. This phase is crucial for restoring the nucleus in each daughter cell before cytokinesis occurs.

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Related Practice

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.

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Textbook Question

Which of the following does not occur during mitosis?

a. Condensation of the chromosomes

b. Replication of the DNA

c. Separation of sister chromatids

d. Spindle formation

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Textbook Question

What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?

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Textbook Question

What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?

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Textbook Question

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.

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Textbook Question

In the light micrograph below of dividing cells near the tip of an onion root, identify a cell in interphase, prophase, metaphase, anaphase, and telophase. Describe the major events occurring at each stage.

<IMAGE>

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Multiple Choice

Which of the following are the correct phases of mitosis in order?

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Multiple Choice

Which of the following does not occur during mitosis?

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