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NEET BIOLOGYMedium

Select the correct sequence of events occurring during Prophase-I of Meiosis-I: (a) Synapsis of homologous chromosomes (b) Crossing over between non-sister chromatids (c) Condensation of chromatin (d) Dissolution of the synaptonemal complex (e) Terminalisation of chiasmata

A

(c) → (b) → (e) → (d) → (a)

B

(c) → (a) → (b) → (d) → (e)

C

(b) → (c) → (a) → (d) → (e)

D

(c) → (a) → (b) → (e) → (d)

Step-by-Step Solution

the sequence of events in Prophase I is:

  1. Leptotene: Compaction of chromosomes/chromatin condensation (c) .
  2. Zygotene: Pairing of chromosomes called synapsis (a) .
  3. Pachytene: Crossing over occurs between non-sister chromatids (b) .
  4. Diplotene: Dissolution of the synaptonemal complex and appearance of chiasmata (d) .
  5. Diakinesis: Terminalisation of chiasmata (e) , .
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Solved: BIOLOGY Question for NEET | Sushrut