  We study pattern-forming dissipative systems in growing domains. We
characterize classes of boundary conditions that allow for defect-free growth
and derive universal scaling laws for the wavenumber in the bulk of the domain.
Scalings are based on a description of striped patterns in semi-bounded domains
via strain-displacement relations. We compare predictions with direct
simulations in the Swift-Hohenberg, the Complex Ginzburg-Landau, the
Cahn-Hilliard, and reaction-diffusion equations.
