That teacher, it appears to me, is being given an all - but - impossible assignment, akin to presenting a general - practitioner physician with twenty - three patients who manifest different symptoms, differing degrees of illness, and, upon examination,
very different ailments.
Not exact matches
But the exact causes of the vast majority of autism - related disorders remain a mystery: classic genetic studies, which tie the
ailment to single nucleotide polymorphisms (SNPs — deletions, additions or substitutions of one unit in the genetic code), have returned a number of
different markers with
very few well - replicated candidates.