title: Mental retardation in association with a balanced X-autosome translocation and random inactivation of the X chromosomes.
abstract: A women whose karyotype shows an apparently balanced reciprocal translocation, 46,X,t(Xq +; 10q-) is described. She is profoundly mentally retarded and shows minor physical abnormalities with normal sexual development. There is a random pattern of late replication of the normal X and X involved in the translocation, whereas in most balanced X-autosome translocations there is preferential inactivation of the normal X.
mesh_terms: D001345:Autoradiography; D002871:Chromosome Banding; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008875:Middle Aged; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations; D014178:Translocation, Genetic; D014960:X Chromosome