Genotype and phenotype Original Scenario-Based Download PDF

Questions

1. 1.

   In an arboretum cultivating subterranean glass mosses, stem bioluminescence is determined by a single Mendelian gene with complete dominance: the dominant allele ($G$) confers an emerald glow, whereas the recessive allele ($g$) confers a silver glow. A researcher observes two separate colonies that both display the vibrant emerald glow. Which statement correctly distinguishes between the phenotype and the genotype of these moss colonies?

   • A) While both colonies share an identical emerald phenotype, their genotypes may be either homozygous dominant ($GG$) or heterozygous ($Gg$).
   • B) Because both colonies exhibit the same emerald phenotype, their underlying genotypes must be identical and homozygous ($GG$).
   • C) The observable emerald glow represents each colony's genotype, whereas the specific combination of inherited alleles represents their phenotype.
   • D) A colony with a heterozygous genotype ($Gg$) would display an intermediate blend of emerald and silver rather than the full emerald phenotype.