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What Happens to Chromatin During Prophase and Metaphase of Mitosis?

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Question

What happens to chromatin during prophase and metaphase of mitosis?
Short/Brief Note
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Solution

During prophase of mitosis, the chromatin fibres shorten and become thick to form chromosomes.
During metaphase, the chromosomes appear more distinct and clear and each consists of two parallel strands called chromatids joined by a centromere.

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Chapter 2: Structure of Chromosomes - Exercise 1 [Page 20]

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Frank Biology Part 2 [English] Class 10 ICSE
Chapter 2 Structure of Chromosomes
Exercise 1 | Q 3 | Page 20

RELATED QUESTIONS

The diagram below represents a stage during cell division. Study the same and then answer the questions that follow: 

 

  1. Name the parts labelled 1, 2, and 3.
  2. Identify the above stage and give a reason to support your answer.
  3. Mention where in the body this type of cell division occurs.
  4. Name the stage prior to this stage and draw a diagram to represent the same.

Where does mitosis occur?

Choose the correct answer:
Nuclear membrane reappears in ____________


The diagram below represents a certain stage of a cell.

(i) Is it an animal cell or a plant cell ? Give one reason in support of your answer.
(ii) Label the parts numbered 1 – 3.
(iii) Which stage (phase) of mitosis is represented in this diagram


Draw a labeled schematic representation of mitosis cell division.


Explain the Term Pachytene


Name the following:

Replacement of dead cells is accomplished by which process.


Name the Following

The stage when chromosomes arrange at the equator.


Name the Following

Name the stage during which nuclear membrane and nucleoli reappear.


Give Technical Terms

The stage at which spindle fibres begin to be formed.


Give Technical Terms

Division of nucleus.


Complete the following sentence with appropriate word  :

Colchicine arrests cell division at __________.


Multiple Choice Question:

Karyokinesis is the division of


Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the terms in Column ‘II’ with a suitable idea given in Column ‘I’.

Column I Column II
(i) Anaphase (a) Chromosomes become arranged in a horizontal plane at the equator.
(ii) Prophase (b) Daughter chromosomes move to opposite poles of the spindle.
(iii) Telophase (c) Chromosomes become visible as fine, long threads.
(iv) Metaphase (d) Chromosomes lose their distinctiveness and gradually become transformed into chromatin network.

The diagram given below represents a stage in mitosis.

  1. Identify the stage given above.
  2. Give one reason to support your answer in (a).
  3. Mention the number of chromosomes given in the diagram.

The phase of karyokinesis which is almost the reverse of prophase is ______.


Match List - I with List - II.

List - I List - II
A. Centromere I. Mitochondrion
B. Cilium II. Cell division
C. Cristae III. Сell movement
D. Cell membrane IV. Phospholipid Bilayer

Choose the correct answer from the options given below:


What is the main function of the spindle fibres during mitosis?


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