Question

Match the following with respect to meiosis:
Select the correct option from the following:

Column I	Column II
a. Zygotene	(i) Terminalization
b. Pachytene	(ii) Chiasmata
c. Diplotene	(iii) Crossing over
d. Diakinesis	(iv) Synapsis

• A. a - (i), b - (ii), c - (iv), d - (iii)
• B. a - (ii), b - (iv), c - (iii), d - (i)
• C. a - (iii), b - (iv), c - (i), d - (ii)
• D. a - (iv), b - (iii), c - (ii), d - (i)

Answer 1

The correct option is D a - (iv), b - (iii), c - (ii), d - (i)

The stages of prophase I of meiosis I consists of the following steps:

Leptotene: Compaction of chromosomes.

Zygotene: Pairing of homologous chromosomes by the process of synapsis and formation of the synaptonemal complex. These synapse chromosomes are known as bivalents.

Pachytene: Appearance of recombination nodules and crossing over between the non-sister chromatids of the homologous chromosomes, leading to recombination of genetic material.

Diplotene: Dissolution of the synaptonemal complex and formation of the X-shaped chiasmata.

Diakinesis: Terminalisation of chiasmata, condensation of chromosomes and assembly of spindle microtubules.