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: