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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
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.
For formation of plasma membrane, ______ molecules are necessary.
In which one of the following options the two stages of mitosis have been given in correct sequence?
Identify the stages of mitosis given below and label the figures.
Draw a labeled schematic representation of mitosis cell division.
Explain the Term Pachytene
Explain the Term Cell Diakinesis
Name the Following
Name the stage during which nuclear membrane and nucleoli reappear.
Name the Following
Nuclear envelope and nucleoli reappear in which stage.
Give Technical Terms
The stage in mitosis when the nucleolus starts disappearing.
Give Technical Terms
Division of nucleus.
Multiple Choice Question:
The nuclear membrane disappears in
Identify the stage of mitosis from the below picture. List the chromosomal events in this stage.
