Q18 / 200 · NEET 2022 (Phase 1) · Botany

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

  • A
    Bivalent
  • Correct answer
    B
    Sites at which crossing over occurs
  • C
    Terminalization
  • D
    Synaptonemal complex

Solution

Prophase I in meiosis-I is divided into 5 subphases:

  • In Pachytene there is recombination of chromosomes. This is accomplished by the formation of recombination nodule.
  • There is chiasmata formation in Diplotene which depicts the past recombination event.
  • Terminalisation takes place of chiasmata.

Hence, the correct answer is option: 'B'.

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