Condensation of chromosomes occurs in

Identify the correct sequence of events during Prophase $I$ of meiosis :
$(a)$ Synapsis of homologous chromosomes
$(b)$ Chromosomes become gradually visible under microscope
$(c)$ Crossing over between non-sister chromatids of homologous chromosomes
$(d)$ Terminalisation of chiasmata
$(e)$ Dissolution of synaptonemal complex
Choose the correct answer from the options given below :

In which stage of meiosis does crossing over begin?

Meiosis involves two successive divisions. These divisions are:

In the given figure,what is the ploidy of the chromosomes in the cell labeled $Q$?

In which of the following is the synaptonemal complex observed?