NEETBotanyCell Cycle and Cell Division
Match List-I with List-II regarding the sub-stages of Prophase I in meiosis: (A) Zygotene (i) Terminalisation of chiasmata (B) Pachytene (ii) Visibility of X-shaped chiasmata (C) Diplotene (iii) Formation of synaptonemal complex (D) Diakinesis (iv) Appearance of recombination nodules Choose the correct answer from the options given below:
Options
- A(A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
- B(A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)
- C(A)-(iii), (B)-(ii), (C)-(iv), (D)-(i)
- D(A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
Correct answer
A. (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
Step-by-step solution
During meiosis I, Prophase I is divided into five phases based on chromosomal behaviour. Zygotene is characterised by the pairing of homologous chromosomes (synapsis) and the formation of the synaptonemal complex. (A matches iii) Pachytene is the stage where crossing over occurs, marked by the appearance of recombination nodules. (B matches iv) Diplotene is recognised by the dissolution of the synaptonemal complex and the visibility of X-shaped structures called chiasmata. (C matches ii) Diakinesis is the final sta