In meiosis crossing over is initiated at

Arrange the following events of meiosis in correct sequence
(i)  Crossing over
(ii)  Synapsis
(iii)  Terminalisation of chiasmata
(iv)  Disappearance of nucleolus

A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has

Select the correct option.

Column $${\rm I}$$			Column $${\rm I}$$$${\rm I}$$
A.	Synapsis aligns homologous		(i)	Anaphase $${\rm I}$$$${\rm I}$$
B.	Synthesis of RNA and protein		(ii)	Zygotene
C.	Action of enzymes recombinase		(iii)	G2-phase
D.	Centromeres do not separate but chromatids move towards opposite poles		(iv)	Anaphase $${\rm I}$$
			(v)	Pachytene