Essentials of Genetics 9th Edition by Michael Palladino William Klug, Michael Cummings, Charlotte Spencer

Exercise 12

In Drosophila, gray body color is dominant over ebony body color, while long wings are dominant over vestigial wings. Work the following crosses through the F 2 generation, and determine the genotypic and phenotypic ratios for each generation. Assume that the P 1 individuals are homozygous: (a) gray, long × ebony, vestigial, and (b) gray, vestigial × ebony, long, and (c) gray, long × gray, vestigial.