Identify the event in meiosis mediated by the enzyme recombinase.

In which phase of meiosis does the number of chromosomes become halved?

In which stage are the chromosomes long and thin?

At which stage of meiosis does the centromere divide?

Chromonemata start associating into bivalent chromosomes during

If for a species $2n = 16$,then during $Ist$ prophase and $IInd$ prophase of meiotic division of a cell,how many tetrads and diads will be formed?