translate English to French: In order to tease out the complex relationship between genes and the environment, a number of very large population-based studies have been started, including a project in Iceland that involves the collection and analysis of almost the entire population's DNA.
C'est le cas notamment d'un projet visant à recueillir et à analyser l'ADN de presque toute la population de l'Islande, ou encore de BioBank, un projet de grande envergure mené au Royaume-Uni pour recueillir l'ADN de 500 000 citoyens.