Textbook Question
What major events occur during anaphase of mitosis?
1321
views
Ch. 12 - The Cell Cycle
Freeman7th EditionBiological ScienceISBN: 9783584863285
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 1 - Biology: The Study of Life11
- Ch. 2 - Water and Carbon: The Chemical Basis of Life10
- Ch.3 - Protein Structure and Function11
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells10
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation16
- Ch. 10 - Photosynthesis14
- Ch. 11 - Cell-Cell Interactions14
- Ch. 12 - The Cell Cycle12
- Ch. 13 - Meiosis13
- Ch. 14 - Mendel and the Gene32
- Ch. 15 - DNA and the Gene: Synthesis and Repair8
- Ch. 16 - How Genes Work35
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria19
- Ch. 19 - Control of Gene Expression in Eukaryotes17
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers23
- Ch. 21 - Genes, Development, and Evolution13
- Ch. 22 - Evolution by Natural Selection17
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea17
- Ch. 27 - Diversification of Eukaryotes19
- Ch. 28 - Green Algae and Land Plants18
- Ch. 29 - Fungi19
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals20
- Ch. 32 - Deuterostome Animals19
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function16
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development18
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology16
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology16
- Ch. 54 - Biodiversity and Conservation Ecology16
Chapter 12, Problem 6
What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?
Verified step by step guidance1
Step 1: Understand the question. The question is asking for evidence that suggests that during anaphase, kinetochore microtubules shorten at the kinetochore. Anaphase is a stage in mitosis and meiosis where the chromosomes separate. Kinetochore microtubules are structures that help in this separation process.
Step 2: Recall what happens during anaphase. During anaphase, the sister chromatids separate and move towards opposite poles of the cell. This movement is facilitated by the kinetochore microtubules.
Step 3: Consider the evidence. One piece of evidence is the observation that during anaphase, the kinetochores remain stationary relative to the poles of the cell, even as the chromosomes move towards the poles. This suggests that the microtubules are shortening at the kinetochore, pulling the chromosomes along.
Step 4: Consider additional evidence. Another piece of evidence comes from experiments where fluorescent markers are used to label the ends of the microtubules. These experiments show that the ends of the microtubules at the kinetochore become less fluorescent over time, indicating that they are shortening.
Step 5: Summarize the evidence. The stationary position of the kinetochores relative to the poles of the cell and the decrease in fluorescence at the ends of the microtubules both suggest that during anaphase, kinetochore microtubules shorten at the kinetochore.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Anaphase
Anaphase is a stage in mitosis where sister chromatids are pulled apart toward opposite poles of the cell. This process is crucial for ensuring that each daughter cell receives an identical set of chromosomes. During anaphase, the cohesin proteins that hold the sister chromatids together are cleaved, allowing the microtubules to exert force and facilitate their movement.
Recommended video:
Guided course
02:39
Anaphase
Kinetochore Microtubules
Kinetochore microtubules are specialized structures that connect the spindle apparatus to the kinetochore, a protein complex assembled on the centromere of each chromosome. These microtubules play a vital role in chromosome movement during cell division by attaching to the kinetochores and pulling the chromatids apart. Their dynamic nature allows them to grow and shorten, which is essential for the proper segregation of chromosomes.
Recommended video:
Guided course
03:20Prometaphase
Microtubule Dynamics
Microtubule dynamics refer to the continuous process of growth and shrinkage of microtubules, driven by the addition and loss of tubulin subunits. During anaphase, evidence suggests that kinetochore microtubules shorten as they pull chromatids toward the poles. This shortening is thought to be facilitated by depolymerization at the kinetochore end, which generates the force necessary for chromatid movement.
Recommended video:
Guided course
03:37Disturbances Make Communities Dynamic
Related Practice
Textbook Question
What major events occur during anaphase of mitosis?
2363
views
2
rank
Textbook Question
Identify at least two events in the cell cycle that must be completed successfully for daughter cells to share an identical complement of chromosomes.
1533
views
Textbook Question
What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?
1483
views
Textbook Question
The following statements are about the control of chromatin condensation. Select True or False for each.T/F Reducing histone acetylase activity is likely to decrease gene transcription.T/F Mutations that reduce the number of positively charged amino acids on histones should promote open chromatin.T/F Chromatin remodeling complexes add chemical groups to histones.T/F Adding an inhibitor of DNA methylation is likely to reduce gene transcription.
1318
views
Textbook Question
Compare and contrast the effects of removing growth factors from asynchronous cultures of human cells that are normal and those that are cancerous.
1157
views