The longest phase of meiosis is

The synaptonemal complex is first seen in ...........

Recombination is involved in the process of

Arrange the following stages of meiosis $I$ in the correct sequence:
$(a)$ Crossing over
$(b)$ Synapsis
$(c)$ Terminalization of chiasmata
$(d)$ Disappearance of nucleolus

Which of the following is correctly matched?

Which of the following is true for the $Zygotene$ stage of $Meiosis-I$?