Many details of a plant or an animal are determined by the instructions contained in its genetic code, the blueprints that are wrapped up in the nucleus of each cell.
Taimede ja loomade puhul on arvukate ehituslike üksikasjade määrajaks juhendid, mis sisalduvad nende geneetilises koodis – igas rakutuumas paiknevas ehitusplaanis.