Figure 2 .

(A) Cartoon illustrating the competitive allocation scenario, where a proportion ρ of the total gene product (cylinder) is allocated to trait 2, and the remainder (1 − ρ) to trait 1. (B) Cartoon illustrating the multispecific scenario, where each gene product has two distinct properties (e.g., substrate specificities), with one affecting trait 1 (stars) and the other affecting trait 2 (diamonds).