When I was preparing the previous post, I realized that I needed to deepen my understanding of genetics, genetic mutations, post-translational modifications etc. etc. As l was wondering where to start, I noticed a new post on "The Science of Parkinson's Disease" blog, which just by chance happens to focus on an aspect of genetics.
The omnigenics of Parkinson’s disease? | The Science of Parkinson's disease
And one of the links contained within that post just happens to lead to a "backgrounder" page titled "Genetics of PD".
Genetics of PD | The Science of Parkinson's disease
So I have my starting point.
Maybe others will also find these links to be of interest.