Figure 1.

Pedigree of index patient 70423 (indicated by an arrow) showing a X-chromosomal inheritance pattern. Retinitis pigmentosa segregates in four generations of the family. Squares represent males, circles represent females. Filled symbols show affected males. Individuals included in cosegregation analysis of the mutation and phenotype are indicated by a horizontal bar. Only females who are confirmed carriers of the mutation are shown with a dot in the circle. Of note, additional carriers are likely to exist in this family.