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NEET BIOLOGYMedium

Match List-I with List-II:

List-I (Sub Phase 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

A

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

B

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

C

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

D

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

Step-by-Step Solution

According to the textbook description of Prophase I stages:

  • Diakinesis is marked by the completion of terminalisation of chiasmata .
  • Pachytene is characterised by the appearance of recombination nodules, the sites at which crossing over occurs .
  • Zygotene involves chromosome pairing (synapsis) accompanied by the formation of synaptonemal complex .
  • Leptotene is the stage where chromosomes become gradually visible under the light microscope (appearing as thin threads) .
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