Specific Genetic DisordersThe NHGRI divides its study of genetic disorders into three headings: specific genetic disorders, rare and orphan diseases, and rare hereditary genetic disorders. Students can learn about thirteen different specific genetic disorders, including breast cancer, cystic fibrosis, and Huntington's disease. The rare and orphan diseases studied are Duane Syndrome, Guillain-Barre Syndrome, and trimethylaminuria. ALPS and Pallister-Hall Syndrome are part of the hereditary disorders. Additional resources include a talking genetic glossary, and a disease information center for genetic and rare diseases.