Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?

Prophase of Mitosis

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Both prophase and metaphase of mitosis

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Prophase I during meiosis

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Prophase II during meiosis

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Solution

The correct option is C Prophase I during meiosis
Correct Answer: (d)

During this stage of pachytene (stage of prophase1 of meiosis), bivalent chromosomes now clearly appears as tetrads. This stage is characterized by the appearance of recombination nodules, the sites at which crossing over occurs between non-sisters chromatids of the homologous chromosomes. Paired chromosomes are called as homologous chromosomes. Crossing over is exchange of genetic material between homologous chromosomes. This process completes at the end of pachytene leaving chromosomes linked at sites of crossing over.

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Similar questions

The diagram below represents a stage during cell division. Study the same and then answer the questions that follow :
(a) Name the parts labelled 1, 2 and 3.
(b) Identify the above stage and give a reason to support your answer.
(c) Mention where in the body this type of cell division occurs.
(d) Name the stage prior to this stage and draw a diagram to represent the same.

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