Comparing mitosis and meiosis Original Scenario-Based Download PDF

Questions

1. 1.

   In an orbital greenhouse, geneticist Lyra monitors cellular division cycles in the regenerative lunar moss Selenophyta to separate vegetative tissue repair from spore generation. She introduces fluorescent molecular tags that track chromosome pairing and spindle behavior in real time under high-resolution microscopy. Which observable event definitively confirms that a monitored cell is undergoing meiosis rather than mitosis?

   • A) Alignment of individual replicated chromosomes along the metaphase plate in a single file
   • B) Formation of tetrads and reciprocal exchange of genetic segments between non-sister chromatids
   • C) Separation of sister chromatids guided by spindle fibers moving toward opposite poles
   • D) Breakdown of the nuclear envelope accompanied by chromosome condensation during prophase