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प्रश्न
The diagram below represents a stage during cell division. Study the same and then answer the questions that follow:
- Name the parts labelled 1, 2, and 3.
- Identify the above stage and give a reason to support your answer.
- Mention where in the body this type of cell division occurs.
- Name the stage prior to this stage and draw a diagram to represent the same.
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उत्तर
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- Centrioles
- Spindle fibres
- Chromatids
- Late anaphase is a furrow starting in the cell membrane at the middle of the cell. The stage described in the diagram is the late anaphase of mitosis in an animal cell. It can be identified by the presence of separated chromatids at the cell's two poles. The appearance of the furrow in the cell membrane classifies the stage as the late anaphase.
- Mitosis occurs in somatic cells (e.g., skin, bone marrow), and meiosis occurs in germ cells within reproductive organs (ovaries and testes).
- The stage before anaphase is called the metaphase stage. During the metaphase stage, the chromosomes are aligned at the equatorial region of the cell. The spindles arising from the centrioles get attached to the chromosomes at centromeres. The chromosomes are in the most condensed state in this phase. The below diagram shows the metaphase stage of mitosis:
संबंधित प्रश्न
Genetic recombination occurs in ______ phase of prophase of meiosis-I.
Define the following:
Karyokinesis
Fill in the blank:
______ is the indirect cell division.
The fig given alongside shows a certain stage in a cell division in a cell with four chromosomes.
(i) Name the parts of the chromosome labeled A and B.
(ii) Name the structure C. what is its function?
(iii) Name the type of division . Give a reason.
(iv) Name the stage of division.
(v) Name the stages before and after the stage shown in diagram.
In which one of the following options the two stages of mitosis have been given in correct sequence?
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
Name the following:
Mitosis takes place in which cells.
Name the Following
Nuclear envelope and nucleoli reappear in which stage.
Multiple Choice Question:
The nuclear membrane disappears in
Write the functional activity of the following structure:
Colchicine
In which stage of mitosis the chromosomes align in an equatorial plate? How?
Give the sequence of the events occurring during the prophase of mitosis.
Identify the stage of mitosis from the below picture. List the chromosomal events in this stage.
The diagram given below represents a stage in mitosis.
- Identify the stage given above.
- Give one reason to support your answer in (a).
- Mention the number of chromosomes given in the diagram.
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?
