Part one of term paper
are medical conditions that are caused by an error in a person's genes. Some of them appear as a birth defect, while others do not become distinct until later in life. can range from those that cause death to those that produce only mild problems, such as color blindness or an extra pinky. Scientists have distinguished more than 9,000 g ...

Part two of term paper
... is present. The third category would be the multifactorial disorders. Single-gene disorders result from errors within an individual gene. An example of one would be Huntington’s disease. This condition affects 1 in 10,000 and usually doesn’t affect the person until they are 30 or 40 years old. A person with this disease develops uncontrolled movements and may have problems with coordination, thinking, and judgment. A weakening of the nerve cells in the brain causes these sym ...