The stage between two meiotic divisions is called

In pachytene,each tetrad contains

$S -$ Statement: Recombination nodules are visible during the diplotene stage.
$R -$ Reason: Synapsis occurs during the zygotene stage.

Assertion: Meiosis results in the production of haploid cells.
Reason: Synapsis occurs during leptotene.

During which process does the genetic material replicate once,but the cell divides twice?

The diagram shows meiosis and gamete formation in a cell with four chromosomes. Identify the stages $P$ and $Q$.