Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
This structure is associated with a lysosomal storage disease caused by deficiency of alpha-galactosidase A known as Fabry's disease. The lack of the gene FMR1 on this structure can lead to mental retardation, a syndrome in which this structure is "fragile." In a process known as lyonization, one of these structures deactivates to form a Barr body, and a missing one of these structures causes Turner syndrome. Males that possess an extra copy of this structure have Klinefelter syndrome, and red-green color blindness is a recessive trait linked to this structure. For 10 points, name this sex chromosome of which females possess two.
A:
Science