Arrange the following cytological events in the correct sequential order as they occur during Prophase I of meiosis: A. Terminalisation of chiasmata B. Appearance of recombination nodules C. Dissolution of the synaptonemal complex D. Formation of bivalents Choose the correct answer from the options given below:

Step-by-step solution

Formation of bivalents (D) occurs during the zygotene stage due to the synapsis of homologous chromosomes. Appearance of recombination nodules (B) occurs during the pachytene stage, where crossing over takes place. Dissolution of the synaptonemal complex (C) marks the beginning of the diplotene stage. Terminalisation of chiasmata (A) is the defining event of diakinesis, the final stage of prophase I. The correct chronological sequence of prophase I sub-stages is Zygotene Pachytene Diplotene Diakinesis. Therefore, t