TY - JOUR T1 - The systemic concept of the gene, at age fifteen, and comments on C.N. El-Hani's article 'Between the cross and the sword: the crisis of the gene concept' JO - Genetics and Molecular Biology A1 - GuimarĂ£es, Romeu Cardoso SN - 1415-4757 UL - 10.1590/S1415-47572007000400033 VL - 30 Y1 - 2007 PB - Brasil ER -