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At which of the following stages, the ch...

At which of the following stages, the chromosomes appear single, thin and thread like?

A

Leptotene

B

Zygotene

C

Pachytene

D

Diplotene

Text Solution

Verified by Experts

The correct Answer is:
A
Leptotene also known as leptonema is the first stage of prophase I during which individual chromosomes begin to condense into long strands within the nucleus which are loossely interwoven. However, the two sister chromatids are still so tightly bound that they are indistinguishable from one another. They possess a string of swollen areas called chromomeres.
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NCERT FINGERTIPS-CELL CYCLE AND CELL DIVISION-Cell Cycle And Cell Division
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  2. The term "meiosis" was given by

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  3. At which of the following stages, the chromosomes appear single, thin ...

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  4. Zygotene of prophase-I is characterised by

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  6. Which of the following is correct regarding the given figure?

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  7. The members of a homologous pair of chromosomes

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  8. Which of the following correctly shows a pair of homologous chromosome...

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  9. Which of the following is correct about bivalent? (i) Bivalents are...

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  10. The process of crossing over is assisted by which of the following enz...

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  11. To build up food reserves in the cytoplasm, chromosomes become unfolde...

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  12. At which stage, the homologous chromosomes separate due to repulsion, ...

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  13. Diplotene stage of prophase-I is characterised by

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  14. (i) Thin thread like chromosomes with a beaded appearance (ii) Appea...

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  15. (i) Thin thread like chromosomes with a beaded appearance (ii) Appea...

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  16. Mathc the column I with column II and select the option from given cod...

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  17. Identify the given figures showing meiotic phases and select the corre...

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  18. The figure given below shows a cell undergoing meiosis. Which of ...

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  19. Disjunction refers to

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  20. Lampbrush chromosomes are seen in which typical stage?

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