In meiosis,the chromosome number becomes

Match List-$I$ with List-$II$ :

List-$I$ (Sub Phases of Prophase-$I$)	List-$II$
$A$. Diakinesis	$I$. Synaptonemal complex formation
$B$. Pachytene	$II$. Completion of terminalisation of chiasmata
$C$. Zygotene	$III$. Chromosomes look like thin threads
$D$. Leptotene	$IV$. Appearance of recombination nodules

Choose the correct answer from the options given below:

The structure formed by a pair of synapsed homologous chromosomes is called:

The various stages of meiosis are given in Column-$I$. Match them with the characteristics of the various stages of meiosis in Column-$II$ and select the correct option using the codes given below.

Column-$I$	Column-$II$
$A$. Pachytene	$i$. Pairing of homologous chromosomes
$B$. Metaphase-$I$	$ii$. Terminalization of chiasmata
$C$. Diakinesis	$iii$. Crossing over occurs
$D$. Zygotene	$iv$. Alignment at the equatorial plate

Crossing over takes place at a stage between

The number of chiasmata depends on the ........