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Published online by Cambridge University Press: 19 January 2024
An email with a black box warning! That’s what I got 11 years ago after Lois and I submitted saliva samples to a DNA testing service. Lois is the family genealogist, and she thought that DNA testing would be helpful in filling in some of the missing branches of our ancestral trees. In addition to lists of DNA relatives, the report included many risk genes for a variety of medical conditions, none of which were present for either of us. However, this locked black box contained two genes of neurological interest. A mutation in the LRRK-2 gene is the most common cause of hereditary Parkinson’s disease, and the APOE-4 allele is the most significant genetic risk factor for late onset Alzheimer’s disease.
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