The beginning of a particular stage of prophase I is recognised by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers. Identify the stage.

Step-by-step solution

According to NCERT, the beginning of diplotene is recognised by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers. These X-shaped structures are called chiasmata. Zygotene is characterised by the formation of the synaptonemal complex and synapsis. Pachytene is characterised by the occurrence of crossing over. Diakinesis is marked by the terminalisation of chiasmata. Answer: Diplotene