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

Exercise 15

Another recessive mutation in Drosophila , ebony ( e ), is on an autosome (chromosome 3) and causes darkening of the body compared with wild-type flies. What phenotypic F 1 and F 2 male and female ratios will result if a scalloped-winged female with normal body color is crossed with a normal-winged ebony male? Work this problem by both the Punnett square method and the forked-line method.