Representation of genotypes in persons with homozygous HLA haplotype. Data from chromosome 6p (24-37 Mb) of persons with homozygous HLA haplotype are shown. Each column indicates 1 person (72 persons with homozygous HP-P1, 10 persons with homozygous HP-P2, and 8 persons with homozygous HP-P3). Each of the 2389 evenly spaced rows represents 1 SNP locus. Blue row represents homozygous genotype; and red row, heterozygous genotype. Missing genotypes were not counted.