Figure 1. Pedigrees of families clinically diagnosed with autosomal dominant retinitis pigmentosa (adRP) with suspected non-penetrance (FAM1, FAM2) and dominant pedigree (FAM3). Filled symbols indicate diagnosis of RP. Individuals for whom DNA samples were available are indicated with identification (ID) numbers; probands are marked with arrows. ‘-’ indicates the presence of a mutation, and ‘+’’ indicates the presence of a wild-type allele, detailed in Table 1.