Early-onset Alzheimer's disease differs from late-onset in that ________
A) it appears to be caused by rare genetic mutations.
B) symptoms invariably involve delusions and assaultive behavior.
C) genetics play little or no causal role.
D) environmental factors have no impact on the onset or the progression of the disorder.

Question

Quizplus · Accepted Answer

Early-onset Alzheimer's disease is usually associated with rare genetic mutations, particularly mutations in genes that code for amyloid precursor protein (APP), presenilin 1 (PSEN1) or presenilin 2 (PSEN2). In contrast, late-onset Alzheimer's disease is more likely to be influenced by a combination of multiple genetic and environmental factors.

Early-Onset Alzheimer's Disease Differs from Late-Onset in That ________