The APOE-e4 gene has varying penetrance so even persons at the highest risk may never develop the disease.

Name: The APOE-e4 gene has varying penetrance so even persons at the highest risk may never develop the disease.
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The APOE-e4 gene is associated with an increased risk of Alzheimer's disease, but not everyone with the gene will develop the disease due to its varying penetrance and the influence of other genetic and environmental factors.

The APOE-E4 Gene Has Varying Penetrance So Even Persons at the Highest