During which stage do the bivalent chromosomes clearly appear as tetrads?

What are the various stages of meiotic prophase-$I$? Enumerate the chromosomal events during each stage.

Which process involves the exchange of genetic material between non-sister chromatids?

Meiotic cell division takes place during

Which of the following types of cell division results in a reduction of the chromosome number?

$A$ : Chiasmata counting stage is diplotene.
$R$ : Dissolution of the synaptonemal complex occurs except at the sites of crossovers.