The Effect of Genetic and Environmental Variation on Genital Size in Male Drosophila: Canalized but Developmentally Unstable
Figure 2
Model of a selection regime that alters the slope of the genital-body scaling relationship while maintaining genital-autonomous genetic variation.
Selection is for proportionally smaller genitalia in large males and proportionally larger genitalia in small males (black arrows). Implicit to such a regime is that there is selection or constraint maintaining variation in body size (gray arrows).
