Match List-I with List-II: List-I (Sub Phases of Prophase I) A. Diakinesis B. Pachytene C. Zygotene D. Leptotene List-II (Specific characters) I. Synaptonemal complex formation II. Completion of terminalisation of chiasmata III. Chromosomes look like thin threads IV. Appearance of recombination nodules Choose the correct answer from the options given below:
Answer: (B) A-II, B-IV, C-I, D-III. Answer: A-II, B-IV, C-I, D-III Solution: Diakinesis (A) is marked by completion of terminalisation of chiasmata (II); pachytene (B) shows the appearance of recombination nodules (IV); zygotene (C) is when the synaptonemal complex forms during synapsis (I); and leptotene (D) is when chromosomes are gradually visible as thin threads (III).
- A.A-I, B-II, C-IV, D-III
- B.A-II, B-IV, C-I, D-III✓
- C.A-IV, B-III, C-II, D-I
- D.A-IV, B-II, C-III, D-I
Correct Answer
(B) A-II, B-IV, C-I, D-III
Solution & Explanation
Answer: A-II, B-IV, C-I, D-III Solution: Diakinesis (A) is marked by completion of terminalisation of chiasmata (II); pachytene (B) shows the appearance of recombination nodules (IV); zygotene (C) is when the synaptonemal complex forms during synapsis (I); and leptotene (D) is when chromosomes are gradually visible as thin threads (III). This exact pairing matches option B; the other combinations misassign the synaptonemal complex or recombination nodules. NCERT Reference: Ch 10, p.126, lines 81-86 — "final stage of meiotic prophase I is diakinesis"