Revision as of 01:44, 28 June 2020 by wikia:lgbta>Paiige1 (Created page with "{{Stub}}thumb|220x220px|The XYY pride flag. '''XYY Syndrome '''or '''47,XYY '''or '''Jacob's Syndrome '''is an [https...")
XYY Syndrome or 47,XYY or Jacob's Syndrome is an intersex trait affecting approximately 1/1000 AMAB individuals, and causes them to have extra Y chromosomes, typically only one.