A conservation survey of a coastal beetle species, Cicindela scutellaris, investigated the inheritance of wing-case coloration. This trait is determined by a single gene with two alleles, where the allele for metallic green coloration (GGG) is dominant over the allele for copper-red coloration (ggg).
A representative sample from the population revealed that 91% of the beetles displayed the dominant metallic green phenotype.
Assuming this beetle population is in Hardy–Weinberg equilibrium, calculate the percentage of beetles in the population that are heterozygous (GgGgGg) for this gene.
