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NEET BIOLOGYMedium

Match List-I with List-II regarding the stages of Prophase-I (Meiosis I):

List-I (Event) A. Chiasmata B. Crossing over C. Synaptonemal complex D. Terminalisation of chiasmata

List-II (Stage) I. Pachytene II. Diakinesis III. Diplotene IV. Zygotene

A

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

B

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

C

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

D

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

Step-by-Step Solution

According to the textbook description of Prophase I stages:

  • (A) Chiasmata: The X-shaped structures are called chiasmata and appear during the Diplotene stage .
  • (B) Crossing over: Occurs between non-sister chromatids of homologous chromosomes during Pachytene .
  • (C) Synaptonemal complex: Chromosome synapsis is accompanied by the formation of this complex during Zygotene .
  • (D) Terminalisation of chiasmata: This marks the final stage of meiotic prophase I, known as Diakinesis .
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