Which is true for a twenty-year-old woman with a gene for Huntington's disease? A) It is likely that symptoms of Huntington's disease have already started to appear. B) It is likely that symptoms of Huntington's disease appeared in childhood and have since faded. C) She will probably be stricken with Huntington's disease before her 25^th birthday. D) She is most likely to develop symptoms of Huntington's disease by middle age.

Question

Quizplus · Accepted Answer

Individuals with the gene for Huntington's disease typically develop symptoms in middle age, with onset averaging around 40 years old. Symptoms do not typically appear in childhood and rarely appear before the age of 20. Therefore, it is unlikely that the 20-year-old woman with the gene for Huntington's disease has already experienced symptoms or will develop them before middle age.

Which Is True for a Twenty-Year-Old Woman with a Gene