Arches. Photo by Daniel Chia
HOPES: Huntington's Outreach Project for Education, at Stanford
Nov
16
2010

mutation

Any heritable change in DNA. Such changes can cause the body to function in new and different ways, which may be either helpful or harmful to the individual. Statistically speaking, most mutations are harmful. There are many types of mutations, such as chromosomal mutations, point mutations, contractions, and expansions.