In about 90% of cases, Huntington's disease is inherited. But in 10% of cases, there is no evidence that a parent has the disease. Why do you think this is the case?

Question

Aedan Massey

Biology

4 June, 12:36

In about 90% of cases, Huntington's disease is inherited. But in 10% of cases, there is no evidence that a parent has the disease. Why do you think this is the case?

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Answers (2)

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Santino · Answer 1

New mutations can also occur randomly, so there's a chance that children of parents who didn't inherit the gene for Huntington's can develop a mutation in the gene that causes Huntington's disease.

Cael Page · Answer 2

They weren't passed down with those genes