title: X chromosome and color blindness.
abstract: A red-green color blindness was studied in four families. All the carriers of the gene (mothers and sisters of the color blind individuals) had normal color vision. The color blind individuals were protanomalous or deuteranomalous. No protanopia or deuteranopia was found in the subjects who have been studied.
mesh_terms: D003117:Color Vision Defects / Q000235:genetics*; D005260:Female; D005808:Genes, Recessive; D006801:Humans; D008297:Male; D010375:Pedigree; D012730:Sex Chromosomes; D014960:X Chromosome