Tags: Disease.
Triple X syndrome (also known as triplo-X trisomy X XXX syndrome 47XXX aneuploidy) is a form of chromosomal variation characterized by the presence of an extra X chromosome in each cell of a human female. The condition occurs only in females. Females with triple X syndrome have three X chromosomes instead of two. The karyotype reads 47XXX. A mosaic form also occurs where only a percentage of the body cells contain XXX while the remainder carry XX.
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