Part of my Gene Mutation assignment

Gene mutation can be caused by changes in the environment and at any stage of that person’s life. They could be hereditary, this happens when these mutations are inherited from a parent that will be passed to their offspring. For example, some of the inherited gene disorders are cystic fibrosis, sickle cell anemia and Tay-Sachs. Permanent changes can be rare but also common that sometimes it is considered a normal variation in DNA.