NEETBotanyCell Cycle and Cell Division
Match List-I with List-II regarding the events of Prophase I. List-I List-II (A) Zygotene (I) Terminalisation of chiasmata (B) Pachytene (II) Formation of chiasmata (C) Diplotene (III) Crossing over (D) Diakinesis (IV) Synapsis Choose the correct answer from the options given below:
Options
- A(A)-(IV), (B)-(II), (C)-(III), (D)-(I)
- B(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
- C(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
- D(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Correct answer
D. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Step-by-step solution
The correct matching of the substages of Prophase I with their defining events is as follows: Zygotene (A) is characterised by the pairing of homologous chromosomes, a process called synapsis (IV). Pachytene (B) is the stage where crossing over (III) occurs between non-sister chromatids of homologous chromosomes. Diplotene (C) is recognised by the dissolution of the synaptonemal complex and the formation of X-shaped structures called chiasmata (II). Diakinesis (D) is marked by the terminalisation of chiasmata (I).