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

Exercise 15

Drosophila may be monosomic for chromosome 4, yet remain fertile. Contrast the F 1 and F 2 results of the following crosses involving the recessive chromosome 4 trait, bent bristles: (a) monosomic IV, bent bristles × normal bristles; (b) monosomic IV, normal bristles × bent bristles.