NEETBotanyCell Cycle and Cell Division
Match List-I with List-II: List-I List-II (A) Zygotene (I) Terminalisation of chiasmata (B) Pachytene (II) Appearance of recombination nodules (C) Diplotene (III) Formation of synaptonemal complex (D) Diakinesis (IV) Appearance of X-shaped chiasmata Choose the correct answer from the options given below:
Options
- A(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
- B(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
- C(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
- D(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Correct answer
A. (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
Step-by-step solution
During Prophase-I of meiosis, different substages are characterised by specific cytological events: Zygotene (A) is characterised by the pairing of homologous chromosomes (synapsis) and the formation of the synaptonemal complex (III). Pachytene (B) is marked by the appearance of recombination nodules (II), which are the sites of crossing over. Diplotene (C) begins with the dissolution of the synaptonemal complex, and the homologous chromosomes separate except at the sites of crossovers, forming X-shaped structures