The synaptonemal complex appears

1 and 2

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1,3 and 4

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2,3 and 4

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1,2,3 and 4

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Solution

The correct option is A 1 and 2
The synaptonemal complex (SC) is a protein structure that forms between homologous chromosomes (two pairs of sister chromatids) during meiosis and is thought to mediate chromosome pairing, synapsis, and recombination. Since pairing and synapsis occur in zygotene stage, the synaptonemal complex is seen zygotene stage.
So, the correct option is A.

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Similar questions

	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

Sr.no	List I	Sr.no	List II
A.	Synaptonemal complex	1.	Pachytene
B.	Recombination nodule	2.	Zygotene
C.	Terminalisation of chiasmata	3.	Telophase I
D.	Formation of dyad cell	4.	Diakinesis

Sr. no	List I	Sr.no	List II
A.	Chromosomes move to equator	1.	Pachytene
B.	Centromere splits and chromatids move apart	2.	Zygotene
C.	Pairing between homologous chromosomes	3.	Anaphase
D.	Crossing over between homologous chromosomes	4.	Metaphase

\begin{matrix} Column-I & Column-II (a) & Zygotene & (i) & Recombination between homologous chromosomes (b) & Diplotene & (ii) & Formation of synaptonemal complex (c) & Pachytene & (iii) & Terminalisation of chiasmata (d) & Diakinesis & (iv) & Chiasmata formation \end{matrix}

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