<prompt> Cat eye syndrome is -Paial trisomy 18Paial trisomy 13Paial trisomy 21Paial trisomy 22  <response>: Ans. is d i.e., Paial Trisomy 22 Cat eve syndrome o The supernumerary cat eye syndrome CES chromosome is dicentric, containing two copies 22g11. Features i Ocular cloboma of iris, choroid or optic nerve vii Cystic dysplasia ii Preauricular skin tags or pits viii Mild mental retardation iii Congenital hea disease ix Microphthalmia iv Anal atresia with fistula x Microtia with atresia of the external meatus v Renal malformation -- UL renal agenesis xi Intra-or extra hepatic biliary atresia vi Antimongoloid slant of eye. xii Malrotation of gut. 