Question: Inversion loops are observable during which of the following stages of meiosis?
Options:
Diplotene
Metaphase I
Pachytene
Zygotene
✅Explanation:Inversion loops are visible during pachytene, the third stage of prophase I in meiosis. During this stage, homologous chromosomes pair up closely, allowing for genetic exchange (crossing over) between non-sister chromatids.
🔴 Related Terminology:
-Inversion: A chromosomal rearrangement where a segment of a chromosome breaks, reverses its orientation, and rejoins.
-Pachytene: The stage of prophase I where homologous chromosomes undergo complete synapsis, allowing for crossing over and visualization of inversion loops.
-Crossing over: The exchange of genetic material between non-sister chromatids of homologous chromosomes.
-Chiasmata: X-shaped structures formed at crossover points, visible during diplotene.