A geneticist from an alien planet that prohibits genetic research brought with him to Earth two pure-breeding lines of frogs. One line croaks by uttering 'rib-it rib-it' and has purple eyes. The other line croaks more softly by muttering 'knee-deep knee-deep' and has green eyes. With a newfound freedom of inquiry, the geneticist mated the two types of frogs, producing F₁ frogs that were all utterers and had blue eyes. A large F₂ generation then yielded the following ratios: 27/64 blue-eyed, 'rib-it' utterer 12/64 green-eyed, 'rib-it' utterer 9/64 blue-eyed, 'knee-deep' mutterer 9/64 purple-eyed, 'rib-it' utterer 4/64 green-eyed, 'knee-deep' mutterer 3/64 purple-eyed, 'knee-deep' mutterer In another experiment, the geneticist crossed two purple-eyed, 'rib-it' utterers together with the results shown here: 9/16 purple-eyed, 'rib-it' utterer 3/16 purple-eyed, 'knee-deep' mutterer 3/16 green-eyed, 'rib-it' utterer 1/16 green-eyed, 'knee-deep' mutterer What were the genotypes of the two parents?