Figure 1. Pedigree drawing of family PKRP020 with haplotypes of chromosome 1p markers. Squares represent men, circles represent women, filled symbols are affected individuals, a double line between individuals indicates consanguinity, and a diagonal line through a symbol is a deceased family member. The haplotypes of eight adjacent chromosome 1p31 microsatellite markers are shown with alleles forming the risk haplotype shaded black, alleles cosegregating with retinal dystrophy but not showing homozygosity shaded gray, and alleles not cosegregating with retinal dystrophy are shown in white.