Meiosis Original Scenario-Based Download PDF

Questions

1. 1.

   In an advanced synthetic biology laboratory, researchers engineer a biosensor strain of yeast whose chromosomes emit distinct green and magenta fluorescence to trace meiotic progression in real time. The cells successfully navigate through Prophase I, completing synapsis and genetic recombination, but enter a temporary arrest at the start of Anaphase I. If the scientists supply the molecular signal required to overcome this checkpoint and proceed through this specific phase, which process will directly occur?

   • A) Sister chromatids will split at their centromeres, ensuring that each resulting nucleus receives an identical set of genetic clones.
   • B) Homologous chromosomes will separate and move toward opposite poles, initiating the reduction from diploid to haploid.
   • C) Non-sister chromatids will duplicate their DNA a second time, restoring diploid chromosome numbers prior to cytokinesis.
   • D) Homologous pairs will remain physically locked together, fusing into a single polyploid nucleus at one side of the cell.