A geneticist from an alien planet that prohibits genetic research brought with him two true-breeding lines of frogs. One frog line croaks by uttering “rib-it rib-it” and has purple eyes. The other frog line croaks by muttering “knee-deep knee-deep” and has green eyes. He mated the two frog lines, producing F1 frogs that were all utterers with blue eyes. A large F2 generation then yielded the following ratios:
(a) How many total gene pairs are involved in the inheritance of both eye color and croaking?
(b) Of these, how many control eye color, and how many con- trol croaking?
(c) Assign gene symbols for all phenotypes, and indicate the genotypes of the P1, F1, and F2 frogs.
(d) After many years, the frog geneticist isolated true-breeding lines of all six F2 phenotypes. Indicate the F1 and F2 phenotypic ratios of a cross between a blue, mutterer and a purple, utterer.
Extracted text: 27/64 blue, utterer 12/64 green, utterer 9/64 blue, mutterer 9/64 purple, utterer 4/64 green, mutterer 3/64 purple, mutterer