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. Author manuscript; available in PMC: 2012 Apr 17.
Published in final edited form as: Clin Exp Optom. 2009 Mar 17;92(4):356–361. doi: 10.1111/j.1444-0938.2009.00359.x

Figure 1.

Figure 1

Genetic analysis of a family with two types of colour vision defect. Top, Pedigree of a heterozygous female. I-2, III-1, III-2, and III-7 are all obligate carriers. They had normal colour vision but were untested genetically. I-1 and III-4 (also untested genetically) tested as deutan and protan, respectively, on the AO-HRR & Neitz Colour Vision Test. Bottom, Color defective genotypes present in the family. A complete genetic analysis and colour vision testing was done on II-2, II-4, III-5, and III-6. Results revealed a deuteranomalous geneotype in III-5 where the first two genes in the L/M array encoded L-type pigments differing slightly in spectral sensitivity. II-2 and III-6 had an L/M gene array predictive of a protanopic phenotype, as there were no L genes and the remaining M genes encoded pigments with identical spectral sensitivity. The proband (II-4) had both the deuteranomalous and protanopic gene arrays.