This figure was published in Jahan et al 2024 Evolution Letters and illustrated by Israt Jahan. The panel on the left shows the two predictions of coordination hypothesis, where incompatibilities in development may impede fitness. The panel on the right shows the possibility of mutations generating beneficial fitness consequences upon mixing. The gray dotted lines represent the Null hypothesis (additivity). Circles represent the 50:50 mixtures that were tested in the study.
