while late-onset alzheimer's is not a genetic condition, and there are no genes that code for it, or any statistically meaningful known associated genetic risk factors that increase the likelihood of getting alzheimer's as one ages, the mechanism by which it causes disease (it seems to be mostly caused by air pollution from cars.) leads to damaged genes in the patient with the disease.

it sounds like what she's observing is consequently a mechanism in the brain to clear damaged cells out, and that she may be confusing a reaction for the cause, potentially due to blurry thinking about what the cause actually is.

there are some forms of early onset alzheimers that appear to have a genetic basis, but it's not clear that what is called early onset and late onset alzheimers are actually the same thing.

you probably want to let these cells do their work, and focus on eliminating the factors creating the damaged cells that they're cleaning up.

https://www.youtube.com/watch?v=h6L-lALrMEU