List the odd one out among the following
Trisomy 18 is Edward syndrome & not Noonan syndrome. Noonan syndrome occurs in both males and females with a normal karyotype(46,XX and 46,XY). Refer to the image below.
Single Gene Disorders
Trisomy 18 (Noonan syndrome)
Trisomy 21 (Downs syndrome)
Trisomy 18 (Edwards synd.)
Trisomy 13 (Patau synd.)
Trisomy 18 (Noonan syndrome)