21st July 2023

A 54-year-old lady presents whose sister has recently had a diagnosis of Huntington’s disease.

A 54-year-old lady presents whose sister has recently had a diagnosis of Huntington’s disease. She studied biology at university and is therefore interested in the patterns of inheritance and the genetics behind it. She wonders what the error in the gene is that causes Huntington’s.

What is the disease caused by?

Select the SINGLE most appropriate option from the list below. Select ONE option only.