__ has mental retardation, death < 1yo, low set ears, 3rd-4th fingers are covered by 2th and 5th fingers. Genetic Disorder __ has mental retardation, death < 1yo, low set ears, 3rd-4th fingers are covered by 2th and 5th fingers. Answer: Trisomy 18: Edwards syndrome Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+