yet deviant behavior in autosomal chromosome aberrations , especially the down syndrome , on account of their severity and considerable reduction of intelligence of those affected , are far less important to the public than the gonosomal aberrations : the klinefelter syndrome ( xxy ) , the xyy syndrome , gonadal dysgenesis ( turner 's syndrome , xo ) .
C0036868
gonosomal aberrations
C3266843
xyy syndrome