Here is one:

http://www.sciencedirect.com/science/article/pii/S0014299900...

If you want more:

http://lmgtfy.com/?q=personality+genetics+pubmed

Scientists are still primitive in the understanding of the human brain, but as you can see, one factor in your behavior and personality (ie. motivation, persistence, ease-of-anger, compulsion, etc) is the complex relationship between neurotransmitters and their receptors (and millions of other factors of which we have no clue) These relationships are largely genetic, they are inherited to us.

I have something to add of my own: Every characteristic about us, every move or action that we make, has a relationship (or is a byproduct) of some sort of gene(s) working together. You can even call it FATE if you want.