Huntington's disease is an unusual genetic disorder. What happens with the dominant alleles in a person with this fatal disease?

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Huntington's disease is caused by a dominant allele, meaning that if a person inherits even one copy of the allele from one parent, they will develop the disease. However, the onset of symptoms typically occurs later in life, so affected individuals can still pass on the allele before they are even aware of having the disease. Therefore, the impact is late enough in life that the individual can reproduce.

Huntington's Disease Is an Unusual Genetic Disorder