<prompt> Downs syndrome is:Trisomy 21Trisomy 18Trisomy 1345,X  <response>: Symptoms of downs syndrome Trisomy 21: Mental retardation Epicanthic folds and flat facial profile Simians crease Umblical hernia Hypotonia Gap between first and second toe Congenital hea defects Trisomy 18 Edwards syndrome symptoms: Prominent occiput Mental retardation Low set ears Congenital hea defects Rocker-bottom feet Trisomy 13 Patau syndrome symptoms: Microphthalmia Microcephaly and mental retardation Polydactyly Cleft lip and palate Renal defects Turner syndrome 45,X include: Sho stature Coarctation of aoa Cubitus valgus Streak ovaries, infeility, amenorrhea Peripheral lymphedema at bih Low posterior hairline Webbing of neck Broad chest and widely spaced nipples 