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Which of the following is not true for leptotene phase?

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Which of the following is not true for leptotene phase?

(a) It is a short phase

(b) Chromosomes have beads on a string appearance

(c) Longitudinal double nature of chromosome starts to appear

(d) Bouquet like structure is formed

I got this question during an online interview.

The question is from Meiosis Prophase 1 : Leptotene in chapter Chromosomal Changes During Meiosis of Cytogenetics

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Right option is (c) Longitudinal double nature of chromosome starts to appear

Best explanation: In leptotene phase the chromosomes have bead on string appearance with the chromatin fiber arranged like lateral loops on axis. But the bivalent nature is not yet visible at that time.

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