On the planet, PSEG, Rhinoceros Beetles are chosen for leadership positions in government based on their ability to sing Beetle songs. Most Beetles cannot sing at all (wild-type). A single autosomal gene, FRANK, with alleles F(dominant) and f (wild-type) determines whether the individual beetles have this singing phenotype. In a cross between two singing Rhinoceros Beetles, a large F1 progeny is generated. The ratio of singing Beetles to non-singing Beetles in this progeny is 2:1, irrespective of gender. The most likely mode of inheritance for the singing phenotype is: