Question

alzheimers disease is characterized by all of the following except that it
is the most common type of senile dementia.
has a clear genetic basis.
is associated with anterograde amnesia.
is associated with the formation of plaques and neurofibrillary tangles.
is characterized by a progressive loss of memory.

Explanation:

Alzheimer's disease is the most common type of senile dementia, associated with anterograde amnesia, plaque and neurofibrillary tangle formation, and progressive memory loss. While there are genetic factors, it does not have a clear - cut single - gene or simple genetic basis like some Mendelian disorders.

Answer:

has a clear genetic basis.