An XXXX sex chromosome complement in a female with mild mental retardation.
D002648:Child; D002906:Chromosomes, Human, 6-12 and X; D003878:Dermatoglyphics; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007360:Intelligence; D007621:Karyotyping; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations