X-linked mental retardation and an X-chromosome marker.
D002648:Child; D005260:Female; D008040:Genetic Linkage; D005819:Genetic Markers; D006579:Heterozygote; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D009030:Mosaicism; D010375:Pedigree; D010641:Phenotype; D012730:Sex Chromosomes; D012737:Sex Factors; D012744:Sex Ratio; D014960:X Chromosome
D005819:Genetic Markers