Phenotypic Distribution in a Genetic Cross

Consider a genetic study involving a newly discovered gene, G, located on chromosome 5, which significantly influences the phenotypic expression of a specific trait in a population of organisms. The gene exhibits a highly variable mutation rate, leading to several alleles: G₁ (wild type), G₂, G₃, and G₄. In a cross between two individuals, one homozygous G₁ and the other homozygous G₂, the F1 generation displays the wild type phenotype associated with G₁. Upon backcrossing the F1 individuals with homozygous G₁ individuals, the expected phenotypic ratio of the progeny remains to be elucidated considering the presence of multiple alleles demonstrating varying degrees of dominance. Which of the following statements accurately describes the expected distribution of the phenotypes in the F2 generation?