Figure 1. Pedigree of a Chinese family with X-linked retinitis pigmentosa

Blackened squares and circles represent affected males and females, respectively, and empty geometric shapes denote normal individuals. Slashed shapes mark deceased. Female carrier IV:2, is shown with a grey symbol, had myopia, but no full manifestation of retinitis pigmentosa. Arrow points to the proband (III:4). Genotyping data and results from haplotype analysis for four markers (DXS1226, DXS1214, DXS1068, and DXS993) are shown below each symbol.