You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The following are single gene disorders except and explain in detail?
Single-Gene Disorders with Nonclassic Inheritance It has become increasingly evident that transmission of ceain single-gene disorders does not follow classic Mendelian principles. This group of disorders can be clas- sified into four categories: * Diseases caused by trinucleotide-repeat mutations * Disorders caused by mutations in mitochondrial genes * Disorders associated with genomic imprinting * Disorders associated with gonadal mosaicism Disorders include : hemochromatosis,cystic fibrosis, Huntington disease Ref Robbins 9/e pg 168