Sue has a disorder that is produced by an injury to a gene on the X chromosome,producing a mild to moderate mental retardation.She has

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Fragile X syndrome is a disorder caused by a mutation on the X chromosome that leads to the abnormal expansion of a portion of the FMR1 gene. This results in a range of cognitive and behavioral impairments, including mild to moderate intellectual disability in affected individuals, which is consistent with Sue's symptoms. Down syndrome is also associated with intellectual disability, but it is caused by an extra copy of chromosome 21. Tay-Sachs disease is a rare genetic disorder that affects the nervous system, and Klinefelter's syndrome is a chromosomal disorder that affects males and typically results in infertility and other physical symptoms but not cognitive impairment.

Sue Has a Disorder That Is Produced by an Injury