Genetic Disorders

person's genes. Some of them appear as a birth defect, while others do not

become distinct until later in life. Genetic disorders 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 genetic

disorders. Some are exceptionally rare while others are quite common.

There are three types of genetic disorders. The first one is categorized as

single-gene disorders. A second category of genetic diseases is chromosomal

disorders which involves abnormalities of chromosomes in which too much or

too little chromosome material is present. The third category would be the

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

. . .
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