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

To solve the given problem of matching sub-phases of Prophase I (List I) with their specific characteristics (List II), let's analyze each phase:

• Diakinesis: This sub-phase is characterized by the completion of terminalisation of chiasmata. Therefore, it matches with II.
• Pachytene: During this phase, recombination nodules appear which is necessary for the crossover process. Hence, it matches with IV.
• Zygotene: At this stage, synaptonemal complex formation occurs, leading to the pairing of homologous chromosomes. Thus, it matches with I.
• Leptotene: In this phase, chromosomes look like thin threads. Therefore, it matches with III.

Based on the analysis, the correct matching is: A-II, B-IV, C-I, D-III.

Answer 2

A. Diakinesis involves the completion of terminalisation of chiasmata (II).

B. Pachytene is characterized by the appearance of recombination nodules (IV).

C. Zygotene involves the formation of the synaptonemal complex (I).

D. Leptotene is characterized by chromosomes appearing as thin threads (III).

Thus, the correct answer is (3) A-II, B-IV, C-I, D-III.