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One faulty gene on chromosome 4—one of the 23 human chromosomes that contain a person's full genetic code—causes Huntington's disease, a degenerative brain condition.
Anyone who inherits this "dominant" defect from a parent who has Huntington's disease will eventually develop the condition.
Huntington's illness persists in human populations for two key causes, according to research on the evolutionary genetics of this condition: mutation in combination with weak selection.
The transmission of the Huntington's allele is depicted in the diagram to the right.
With dominant illnesses like Huntington's disease (HD), determining risks is typically not too difficult.
Each child typically has a 50% risk of getting it if one parent does. It is also likely that none of the children will catch the illness if neither parent does. Huntington's disease is a genetic dominant condition.
Learn more about to huntington's disease visit here;
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