Monohybrid crosses Original Scenario-Based Download PDF

Questions

1. 1.

   In an orbital botanical conservatory, astrobiologists study crystal-winged beetles whose shell coloration is controlled by a single gene inherited according to Mendelian principles. The allele for emerald coloration ($G$) is completely dominant over the allele for amethyst coloration ($g$). A researcher crosses two emerald-shelled beetles that are both heterozygous carriers of the amethyst allele. If this cross produces a clutch of 120 larvae, how many offspring are expected to display amethyst shells?

   • A) 15
   • B) 30
   • C) 60
   • D) 90