Advertisements
Advertisements
प्रश्न
All chromosomes are arranged parallel to equatorial plane of cell in ______ phase of mitosis.
Advertisements
उत्तर
All chromosomes are arranged parallel to equatorial plane of cell in metaphase phase of mitosis.
Explanation:
During metaphase, the nuclear membrane completely disappears. Chromosomes complete condensation and become clearly visible along with sister chromatids. The chromosomes are arranged parallel to the equatorial plane of the cell. Spindle fibres are formed between the centromere of each chromosome and both centrioles.
APPEARS IN
संबंधित प्रश्न
The diagram given below represents a certain stage of mitosis:
- Identify the stage of cell division.
- Name the parts labelled A and B.
- What is the unique feature observed in this stage?
- How many daughter cells are formed from this type of cell division?
The diagram given below represents a stage during cell division.
Study the same and answer the questions that follow:
- Identify whether it is a plant cell or an animal cell. Give a reason in support of your answer.
- Name the stage depicted in the diagram. What is the unique feature observed in this stage?
- Name the type of cell division that occurs during:
- Replacement of old leaves by new ones
- Formation of gametes
- What is the stage that comes before the stage shown in the diagram?
- Draw a neat, labelled diagram of the stage mentioned in (iv) above keeping the chromosome number constant.
Given below is a diagram representing a stage during mitotic cell division in an animal cell Examine it carefully and answer the questions which follow.
- Identify the stage. Give one reason in support of your answer.
- Name the cell organelle that forms the ‘aster’.
- Name the parts labelled 1, 2 and 3.
- Name the stage that follows the one shown above; how is that stage identified?
- Mention two differences between mitosis and meiosis with regards to:
- The number of daughter cells produced.
- The chromosome number in the daughter cells.
Genetic recombination occurs in ______ phase of prophase of meiosis-I.
With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.
Define the following:
Karyokinesis
Fill in the blank:
______ takes place in body cells resulting in growth and development.
Fill in the blank:
______ is the indirect cell division.
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.
Name the Following
Name the stage during which nuclear membrane and nucleoli reappear.
Give Technical Terms
Division of nucleus.
Complete the following sentence with appropriate word :
Colchicine arrests cell division at __________.
Multiple Choice Question:
The nuclear membrane disappears in
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. |
Give the sequence of the events occurring during the prophase of mitosis.
Name these:
Two steps of the process Mitosis
