Autoimmune hepatitis is a disease in which the bodyâs immune system attacks liver cells of the same organism. This causes the liver to become inflamed, resulting in hepatitis.
1 Gene mutations that occur after birth. 2  Most gene mutations occur after you're born and aren't inherited. 3  A number of forces can cause gene mutations, such as smoking, radiation, viruses, cancer-causing chemicals (carcinogens), obesity, hormones, chronic inflammation and a lack of exercise.
Most of the mutations are not harmful because they are not transcribed to the genes due to a mechanism called DNA repair mechanism. The causes of mutations are so many, but there are tow types of the causes 1- Spontaneous mutations caused by mutagens. 2- Induced mutations caused by radiation, some chemicals.nswers. Best Answer: At the nucleotide level (point mutations): - Substitutions-Insertions-Deletions-Frameshifts This site explains these using illustrations better than I can here: http://evolution.berkeley.edu/evosite/ev...