Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Triple X syndrome ba a gado ba, amma yawanci yakan faru ne a matsayin abin da ya faru yayin samuwar ƙwayoyin haifuwa (ƙwai da maniyyi). Kuskuren rarraba kwayar halitta da ake kira nondisjunction na iya haifar da ƙwayoyin haifuwa tare da ƙarin chromosomes. Misali, kwayar halitta ko kwayar maniyyi na iya samun karin kwafin X chromosome sakamakon rashin rarrabuwa. Idan ɗaya daga cikin waɗannan ƙwayoyin ya taimaka wajen tsara halittar yaro, yaron zai sami ƙarin X chromosome a cikin kowanne cikin ƙwayoyinsa. A wasu lokuta, trisomy X yana faruwa a lokacin rarraba kwayar halitta a farkon ci gaban amfrayo.  Tambaya: Wane ƙarin chromosome ne yaron zai samu?
X