Figure 1. Pedigrees of 15 consanguineous families with autosomal recessive retinitis pigmentosa. A: Pedigrees of families with mutations in a known RP gene, and co-segregation in available family members. Filled symbols, affected; unfilled, unaffected persons. Squares, males; circles, females; arrows, index patients; M, mutated allele; +, wild-type allele. B: Pedigrees of unsolved families.