It is not that genes account for all of the risk for autism, but yet they account for a lot of that risk, because when you look at fraternal twins, that concordance rate is only 31 percent.
Gen memang tidak menjelaskan semua kemungkinan terjadinya autisme, tapi dapat menjelaskan banyak kemungkinan, karena jika Anda perhatikan kembar non-identik, tingkat konkordansinya hanya 31 persen.