If a parent is diagnosed with Alzheimer's disease, how likely is it for the next generation to develop the disease?

What are the symptoms/warning signs of psychotic disorders in a young adolescent?

My brother, who suffers from schizophrenia, has gained a lot of weight due to his meds. Any recommendations other than exercise and diet?  

Is there a certain time during foetal development that can be associated with dopamine inbalance?

Can we check to see if our chromosomes have high-risk genes for common Alzheimer's?

How do people die from Alzheimer's Disease?

Is there a link between mad cow disease and Alzheimer's?

Why was aluminium thought to be a factor in Alzheimer's Disease?

What percent of Down's Syndrome patients develop Alzheimer's?

There are a lot of people in Japan aged 100 and over. Do many of them suffer from Alzheimer's? What contributes to this longevity?