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प्रश्न
In which stage of mitosis the chromosomes align in an equatorial plate? How?
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उत्तर
The chromosomes align in an equatorial plate during metaphase stage of mitosis. Each chromosome gets attached to a spindle fibre by its centromere which is known as the chromosomal fibre. During metaphase the sister chromatids are pulled back and forth until they align along the equator of the cell called equatorial plane.
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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.
Genetic recombination occurs in ______ phase of prophase of meiosis-I.
All chromosomes are arranged parallel to equatorial plane of cell in ______ phase of mitosis.
For formation of plasma membrane, ______ molecules are necessary.
Describe anaphase in mitosis.
Define the following:
Karyokinesis
Identify the stages of mitosis given below and label the figures.
The figure below shows a certain stage of mitosis:
(i) Name the stage,
(ii) Label the parts 1 to 4
(iii) How many chromosomes are shown here?
Explain the Term Cell Diakinesis
Name the following:
The kind of division normally seen at the tip of the root and shoot system.
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
The stage at which spindle fibres begin to be formed.
Write the functional activity of the following structure:
Colchicine
Name these:
Two steps of the process Mitosis
What is the main function of the spindle fibres during mitosis?
