Dihybrid crosses Original Scenario-Based Download PDF

Questions

1. 1.

   In the subterranean cavern moss Lumina silva, spore pod texture and glow wavelength are governed by two independently assorting autosomal genes displaying complete dominance. A smooth outer casing ($S$) is dominant over a textured casing ($s$), and cyan fluorescence ($B$) is dominant over amber fluorescence ($b$). If two dihybrid individuals with the genotype $SsBb$ are cross-pollinated and produce 320 viable offspring, what is the expected number of progeny exhibiting textured pods with cyan fluorescence?

   • A) 20
   • B) 40
   • C) 60
   • D) 180