The gene may produce an altered protein, it may produce no protein, or it may produce the usual protein. Most mutations are not harmful, but some can be. A harmful mutation can result in a genetic disorder or even cancer. Another kind of mutation is a chromosomal mutation.
What are some rare mutations in modern humans?What are some rare mutations in modern humans? Progeria is a rare, fatal genetic condition which accelerates the aging process in children. Within the first two years of life, the signs of aging include growth failure, loss of body fat and hair, aged-looking skin, hip dislocation, heart disease and stroke.