Question

Bouquet stage is observed in____________ stage of the cell division.

• A. Diplotene
• B. Pachytene
• C. Leptotene
• D. Zygotene

Answer 1

The correct option is C

Leptotene

The correct option is C

Explanation of the correct option:

1. Leptotene is the first stage of prophase 1 of meiosis.
2. Chromosomes are divided in half in the daughter cells during meiosis I, the first reduction division of cells.
3. Chromosomes uncoil and morph into thread-like structures at the leptotene stage.
4. The telomeres of all the chromosomes congregate near the nuclear membrane and take on the form of a bouquet during the leptotene stage of meiosis.

Explanation of the incorrect option:

Option A:

1. Homologous chromosomal pairs start to split and migrate apart from one another in late prophase 1 of meiosis 1.
2. Meiosis is a kind of cell division that produces genetically distinct gametes or sex cells.
3. Desynapsis and chiasmata development are features of the diplotene stage.
4. Synaptonemal complexes that were generated during zygotene disintegrate in the diplotene stage, and homologous chromosomal desynapsis begins.
5. Except for the places of crossing over known as chiasmata, homologous chromosomes are distinct from one another.

Option B:

1. At this stage, the maternal and paternal homologous chromosomes cross across and swap chromosomal material.
2. Bridges (chiasmata), which are present at crossing places, come in various numbers.
3. Different facets of the chromosomes can be seen depending on the chiasmata.

Option D:

1. Homologous chromosomes start to align along their whole length during zygotene through a precise process termed synapsis.
2. The synaptonemal complex, which is made up of each pair of chromosomes, is bound together by a protein that resembles a ribbon.
3. The chromosomal pairs are then compressed and coil during pachytene.
4. Due to the coils of chromatin, these synapses, also known as synaptonemal complexes, may develop up and down the chromosomes, enabling several sites of interaction.

Final answer: The bouquet stage is observed in the leptotene stage of cell division.