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added by it is not easy March 1, 2019, 11:45 a.m.
What disease is caused by trisomy 21?
Asperger syndrome
cri-du-chat (cat meowing syndrome)
Down syndrome
Patau syndrome
Most cases of Down syndrome are caused by trisomy 21. Occasionally, the extra chromosome #21 or a portion of it is attached to another chromosome in the egg or sperm; this may cause "translocation Down syndrome." This is the only form of Down syndrome that may be inherited from a parent.
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+1 Very interesting!  my.game-my.world
+1 Very interesting!  Brainy2019
+1 Very interesting!  Ts