Stock Photo: At the Institute of Biology of Lille, France, the UMR 8090 unit of the French National Center for Scientific Research (Centre National de la Recherche Scientifique, CNRS) specialized in the genetics of multifactorial diseases, carries research on the genetic material of families suffering from diabesity (diabetes and obesity). A DNA solution is distributed in plastic plaques before passing a PCR (polymerase chain reaction) : enzymatic amplification in vitro of a DNA sequence.