Question

Match the following:

$\begin{array}{cccc}& \text{Column A}& & \text{Column B}\\ \text{A}& \text{Diplotene}& \text{i}& \text{Appearance of recombination nodule and recombination between homologous chromosomes}\\ \text{B}& \text{Diakinesis}& \text{ii}& \text{Dissolution of the synaptonemal complex and formation of the chiasmata}\\ \text{C}& \text{Zygotene}& \text{iii}& \text{Compaction of chromosomes}\\ \text{D}& \text{Pachytene}& \text{iv}& \text{Terminalisation of the chiasmata}\\ \text{E}& \text{Leptotene}& \text{v}& \text{Synapsis and formation of the bivalent}\end{array}$

• A. A-ii; B-iv; C-v; D-i; E-iii
• B. A-ii; B-v; C-iv; D-iii; E-i
• C. A-v; B-iv; C-i; D-ii; E-iii
• D. A-i; B-iv; C-iii; D-ii; E-v

Answer 1

The correct option is A A-ii; B-iv; C-v; D-i; E-iii

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.