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The late onset of Huntington's disease means it does not usually affect reproduction. [26] The worldwide prevalence of HD is 5–10 cases per 100,000 persons, [101] [102] but varies greatly geographically as a result of ethnicity, local migration and past immigration patterns. [26] Prevalence is similar for men and women.
Huntingtin (Htt) is the protein coded for in humans by the HTT gene, also known as the IT15 ("interesting transcript 15") gene. [5] Mutated HTT is the cause of Huntington's disease (HD), and has been investigated for this role and also for its involvement in long-term memory storage.
The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child.
Huntington's disease, which affects about 30,000 Americans, is a fatal, inherited disorder that causes progressive movement, psychological and cognitive problems. If a parent has it, their ...
This is the case for Huntington's disease, where the trinucleotide repeat encodes a long stretch of glutamine residues. When the repeat is present in an untranslated region, it could affect the expression of the gene in which the repeat is found (ex. fragile X) or many genes through a dominant negative effect (ex. myotonic dystrophy). [citation ...
Chromosomes in Down syndrome, the most common human condition due to aneuploidy. There are three chromosomes 21 (in the last row). A chromosomal disorder is a missing, extra, or irregular portion of chromosomal DNA. [33] It can be from an atypical number of chromosomes or a structural abnormality in one or more chromosomes.