Gene duplication and the environmental regulation of physiology and development

摘要: When different life stages have environmental tolerances, development needs to be regulated so that each stage experiences conditions are suitable for it, if fitness is maintained. Restricting the timing of developmental transitions occur under specific combinations therefore adaptively important. However, impeding can itself incur demographic and costs. How do organisms regulate physiological processes they broadest range permissive conditions? Gene duplication offers one solution: Multiple genes contribute same downstream process, but distinct conditions. We present a simple model examine how sensitivities gene influence distribution which an end process will proceed. The shows retain their function diverge in allow proceed more than combination outcomes depend on upstream components, pathway diversified sensitivities, structure pathway.