Biology Forums - Study Force

A geneticist from an alien planet that prohibits genetic research brought with him two true-breeding lines of frogs. One line croaks by uttering “rib-it rib-it” and has purple eyes. The other line croaks by muttering “knee-deep knee-deep” and has green eyes. He mated the two types, producing F1 frogs, all of whom utter “rib-it rib-it“, and have blue eyes. A large F2 generation yields the following ratio:

27/64 blue eyed, rib-it utter
12/64 green-eyed, rib-it utter
9/64 blue-eyed, knee-deep mutter 9/64 purple-eyed, rib-it utter
4/64 green-eyed, , knee-deep mutter 3/64 purple-eyed, , knee-deep mutter

a. How many total gene pairs are involved in the inheritance of both eye color and croaking?Of these, how many control eye color? How many control croaking?

b. Assign gene symbol for all phenotypes and indicate the genotypes of the P1, F1, and F2 frogs.

c. After many years, the frog geneticist isolated true-breeding line of all six F2 phenotypes. Indicate the F1 and F2 phenotypic ratios of a cross between a blue-eyed mutterer and purple-eyed utterer.

help?

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