Question

Match List I with List II

List I (Sub Phases of Prophase I)		List II (Specific characters)
A	Diakinesis	I	Synaptonemal complex formation
B	Pachytene	II	Completion of terminalisation of chiasmata
C	Zygotene	III	Chromosomes look like thin threads
D	Leptotene	IV	Appearance of recombination nodules

Choose the correct answer from the options given below:

• A. A-IV, B-II, C-III, D-I
• B. A-I, B-II, C-IV, D-III
• C. A-II, B-IV, C-I, D-III
• D. A-IV, B-III, C-II, D-I

Answer 1

The Correct Option is C

The problem requires matching sub-phases of Prophase I (List I) to their characteristic features (List II). An analysis of each phase is as follows:

• Diakinesis: Characterized by the completion of terminalization of chiasmata. This aligns with II.
• Pachytene: Characterized by the appearance of recombination nodules, essential for crossing over. This aligns with IV.
• Zygotene: Characterized by the formation of the synaptonemal complex, enabling homologous chromosome pairing. This aligns with I.
• Leptotene: Characterized by chromosomes appearing as thin threads. This aligns with III.

The correct matching is: A-II, B-IV, C-I, D-III.