2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83397We estimate density of defects frozen into a biological Turing pattern which was turned on at a finite rate. A self-locking of gene expression in individual cells, which makes the Turing transition discontinuous, stabilizes the pattern together with its defects. A defect-free pattern can be obtained by spatially inhomogeneous activation of the genes.7 pages, 5 figuresBiological PhysicsCondensed MatterPattern Formation and SolitonsChemical PhysicsQuantitative Biologytext