Faulty genes can cause body parts or systems to work poorly. Some genetic
diseases appear only when an individual has inherited a certain faulty
gene from both parents.
| NSES Content Standard C
Life Science: Structure and function in living systems Grades 5-8, page 157 Disease is a breakdown in structures or functions of an organism. Some diseases are the result of intrinsic failures of the system. Others are the result of damage by infection by other organisms. |