Question

Arrange the following events of meiosis I in the correct order:
(i) Diplotene
(ii) Pachytene
(iii) Zygotene
(iv) Diakinesis
(v) Leptotene

• A. (i); (ii); (iii); (iv); (v)
• B. (v); (iii); (ii); (i); (iv)
• C. (ii); (iii); (i); (v); (iv)
• D. (i); (iii); (ii); (v); (iv)

Answer 1

The correct option is B (v); (iii); (ii); (i); (iv)

Prophase I of meiosis I has the following stages:

• Leptotene - Compaction of chromosomes
• Zygotene - Synapsis of homologous chromosomes, formation of the bivalent (tetrad) and the synaptonemal complex
• Pachytene - Crossing over of non-sister chromatids of homologous chromosomes and recombination of genetic material
• Diplotene - Dissolution of the synaptonemal complex and formation of the chiasmata
• Diakinesis - Terminalization of chiasmata and assembly of the meiotic spindle.