Activated genes - genes encoding transcripts that only show an increase in expression during embryogenesis (Source: Hooper et al 2007 - PubMed: 17224916). Note: Nov 2018: Gene FBgn0020439 has been split into CG45076, FBgn0266446 and CG45078, FBgn0266448 and CG45077, FBgn0266451. All three genes have been added to the list. NOTE (September 2020): Since creation of this list, FBgn0037417 has since been split into two genes: FBgn0286976 (Osl10a) and FBgn0286977 (Osl10b). Both of these genes have been included in the list.