Tristan has a genetic disorder that results from an abnormality in the X chromosome,which becomes constricted and often breaks.His doctor told Tristan's mother that he has:

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Fragile X syndrome is a genetic disorder that occurs due to an abnormality in the X chromosome. In this disorder, a particular part of the X chromosome becomes constricted and often breaks. This can result in intellectual disability, behavioral and learning challenges, and various physical characteristics. Therefore, the given symptoms match with the Fragile X syndrome. XYY syndrome is a genetic disorder that occurs when a male has an extra copy of the Y chromosome, Turner syndrome is a genetic disorder that affects females and occurs when one of the X chromosomes is missing or partially missing, and Tay-Sachs disease is a genetic disorder that affects the breakdown of fatty substances in the body.

Tristan Has a Genetic Disorder That Results from an Abnormality