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Megasporogenesis

Bouquet stage...

Question

Bouquet stage occurs during :

Leptotene

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Zygotene

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Pachytene

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Diplotene

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Solution

The correct option is A
Leptotene

Leptotene is also known as bouquet stage because all the telomeres tend to contact the nuclear envelope in one spot so that the looped chromosomes balloon out from that point like flower petals.

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Z y g o t e n e \to L e p t o t e n e \to P a c h y t e n e \to D i p l o t e n e \to D i a k i n e s i s

D i a k i n e s i s \to Z y g o t e n e \to L e p t o t e n e \to P a c h y t e n e \to D i p l o t e n e

L e p t o t e n e \to Z y g o t e n e \to P a c h y t e n e \to D i p l o t e n e \to D i a k i n e s i s .

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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 are doubled.

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