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Prophase I

Which among t...

Question

Which among the following is the correct order of phases in prophase I?

Leptotene, diakinesis, pachytene, diplotene, zyotene

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Leptotene, zygotene, pachytene, diplotene, diakinesis

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Diakinesis, diplotene, pachytene, zygotene, leptotene

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Leptotene, pachytene, zygotene, diplotene, diakinesis

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Solution

The correct option is B Leptotene, zygotene, pachytene, diplotene, diakinesis
Meiosis occurs in two phases meiosis I and meiosis II. The meiosis I comprises of prophase I, metaphase I, anaphase I, telophase I. The prophase I comprises of leptotene, zygotene, pachytene, diplotene and diakinesis.
So, the correct answer is option B

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5

Regarding the assertion and reason; choose the correct option_____.

Assertion [A]: Prophase I of Meiosis I is the longest phase during the formation of gametes.

Reason [R]: It has five sub-stages Leptotene, Zygotene, Pachytene, Diplotene and

Diakinesis; during which the number of chromosomes is doubled.

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