| Characteristic | Genetic Disorder | Presentation(Inheritance Pattern) |
| Trinucleotide expansion in exon of HTT gene leading to altered protein | |
| Deficiency in PAH or THB | |
| Mutations in genes involved with collagen | |
| Germline mutation of p53 tumor suppressor gene | |
| Long repeats in FRDA gene results in dimished frataxin and impairment in mitochondrial functioning | |
| Deletion or inactivation of normally active paternal allele on chromosome 15 | |
| Trinucleotide expansion in 3' UTR of DMPK | |
| Methylation and expression of FMR1 affected by deletion or trinucleotide repeat | |
| Deficiency in lysosomal enzyme beta-glucocerebrosidase | |
| Absense or dysfunction of lysosomal enzyme alpha-galactisidase A | |