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Genetic Disorders - Essay

Genetic Disorders

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 genetic
disorders. Some are exceptionally rare while others are quite common.
Types of
There are three types of . 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 ...

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death.
Another single-gene disorder is the Tay Sachs Disease. People who
inherit the faulty Tay Sachs gene lack a crucial enzyme that is needed to break
down fatty substances in brain and nerve cells. As a result, these substances
build up in such large quantities that the central nervous system
gradually stops functioning and the person dies. Symptoms usually become
evident within the first six months of life, and most children die before reaching the age of four. 1 in 3,600 people of eastern European Jewish ancestry carry it.
A category of single-gene disorders known as X-linked disorders involves
genes located on the X chromosome, one of the two sex chromosomes. An
example of an X-linked disorder is hemophilia. People with hemophilia usually
lack 1 of the 14 or more proteins called clotting factors that repair a cut or torn blood vessel. Therefore, when they have an injury their bodies are unable to stop bleeding. About 1 in 10,000 men have hemophilia ...

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Genetic Disorders. (2006, October 13). Retrieved November 30, 2024, from http://www.essayworld.com/essays/Genetic-Disorders/53871

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PAPER DETAILS

Added: 10/13/2006 08:15:30 PM
Category: Science & Nature
Type: Premium Paper
Words: 804
Pages: 3

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