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Huntington's Disease
Beginning of Paper
, or Huntngton's chorea, is a genetic disease that
causes selective neural cell death, which results in chorea, or irregular,
jerking movements of the limbs caused by involuntary muscle contractions, and
dementia. It can cause a lack of concentration and depression. It also may
cau .... Middle of Paper .... other similar affliction, he or she might pass along the gene without
even knowing it.
The gene for Huntington's disease is located on the short arm of
chromosome four in cytogenetic band 4p16.3. It was first identified in 1993.
While everyone posseses this gene, in someone suffering from Huntington's
disease, the number of repeats of a certain trinucleotide, cytozine-adenine-
guanine (CAG), is much larger than what it is in a normal person. In an average
person, the number of repeats is between 9 and 37. But is a sufferer of HD, the
repea ....
733 words | 3 pages
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