what are the chances of my son w/o cah developing it at a later age ?yougest is swcah so i’m going to assume that the one w/o is definetly a carrier,could he possibly get the late onset? very curious about this.i of corse will have him tested to be sure he is a carrier.he has to be because both my husband and i have half a mutant gene and together we make the whole bad one .obviously he doesn’t have the whole bad gene but probably half???? does any one know how this works?