Synaptonemal complex is a ribonucleoprotein structure visible during ___ stages of Meiosis I

Leptotene through diplotene

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Pachytene through diplotene

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Zygotene through pachytene

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Diplotene through metaphase

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Solution

The correct option is A Zygotene through pachytene
Synaptonemal complex is seen in zygotene stage of prophase I. In leptotene stage chromosomes appear thin, uncoiled, elongated. In pachytene stage crossing over occurs. So the correct option is 'zygotene through pachytene'

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Similar questions

(a)	Zygotene	(i)	Condensation of chromatin begins
(b)	Leptotene	(ii)	Dissolution of synaptonemal complex
(c)	Diplotene	(iii)	Synapsis
(d)	Diakinesis	(iv)	Terminalisation of chiasmata

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.

	Column I		Column II
A	Leptotene	1	Terminalisation of chiasmata
B	Zygotene	2	Dissolution of the synaptonemal complex
C	Pachytene	3	Crossing over takes place
D	Diplotene	4	Formation of synaptonemal complex
E	Diakinesis	5	Condensation of chromosome

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