Figure 1. Pedigree drawings with a haplotype formed from the alleles of chromosome 8q microsatellite markers. A: PKRP117. B: PKRP262. C: PKRP344. D: PKRP358. Alleles forming the risk haplotype are black, heterozygous alleles cosegregating with the phenotype are gray, and
alleles not cosegregating with RP are shown in white. Square = male; circle = female; filled symbol = affected individual;
the double line between individuals = consanguineous marriage; the diagonal line through a symbol = deceased family member.