Match the following with respect to meiosis: Column-I a. Zygotene b. Pachytene c. Diplotene d. Diakinesis Column-II (i) Terminalization (ii) Chiasmata (iii) Crossing over (iv) Synapsis Select the correct option from the following:
Answer: (D) a-(iv), b-(iii), c-(ii), d-(i). Answer: a-(iv), b-(iii), c-(ii), d-(i) Solution: In prophase I, Zygotene = synapsis (pairing of homologues), Pachytene = crossing over (recombination nodules), Diplotene = chiasmata (synaptonemal complex dissolves, X-shaped chiasmata appear), and Diakinesis = terminalisation of chiasmata.
- A.a-(i), b-(ii), c-(iv), d-(iii)
- B.a-(ii), b-(iv), c-(iii), d-(i)
- C.a-(iii), b-(iv), c-(i), d-(ii)
- D.a-(iv), b-(iii), c-(ii), d-(i)✓
Correct Answer
(D) a-(iv), b-(iii), c-(ii), d-(i)
Solution & Explanation
Answer: a-(iv), b-(iii), c-(ii), d-(i) Solution: In prophase I, Zygotene = synapsis (pairing of homologues), Pachytene = crossing over (recombination nodules), Diplotene = chiasmata (synaptonemal complex dissolves, X-shaped chiasmata appear), and Diakinesis = terminalisation of chiasmata. This gives a-(iv), b-(iii), c-(ii), d-(i). The other options misassign synapsis and terminalisation to the wrong substages. NCERT Reference: Ch 10, p.126, lines 81-86 — "diakinesis. This is marked by\nterminalisation of chiasmata"