Thoughts - Are interests genetically linked?

 so I really don't know if I'll ever be able to get in a disciplined position to document things as adequately as I should...or I should say to a certain level or standard.

So a recurring idea i have is this...

I strongly feel... have an inkling.. this question...

I know that I'm always looking for answers and that I'm a very slow to adapt myself to a much needed course correction... that is it's taking me a long time to get to this point in my life that i feel.. i know enough now that I'm beginning to accept my humanity... I also know who I am to a greater degree than 10 years ago and I'm really wanting to expand on that even more.

So this idea i have is in relation to ones interests.

How does something become an interest. That is, what is it internally/mentally/biologically/etc that we go "this interest". 

Now this is a observation I've made... if my armchair Wikipedia understanding of epigenetics is correct in this one aspect that traumatic events can encode themsleves upon the individuals DNA and be passed down generationally. Conversely isn't this how instinctual information would be passed down?  I honestly don't know just curious..

Flight or fight.. I get the behavioral aspects to an extent, along with physiology and the typical biological growth dev of a X-type species of animal we all share air on this rock with. So I'm wondering how much does that play a part in it? Along with environmental factors... socioeconomic.... geographical... right time.. and place... those events that get passed down from one generation to another... foods that just seem to provide a primal dopamine warmth or pick and choose an event that is shared... why do we have the satisfied feeling we get when we empty a very full bladder.... like how was that evolutionary process for us to end up with that?

Having a broad shared level of experiences I think just broadens the elation with those in a shared moment that feels human, a higher level of empathy. I have or at least I believe I have enough documented evidence that I have always have this love for corn... aside from this weird period as a kid I avoided corn tortillas for the most part.. mainly flour was my go to. Then I had real homemade fresh corn tortillas... magical... real food.. homemade comfort food.. what is that primal feeling.. rice and beans.. it's just something beyond...

having real food.. just seems to activate this deeper level of satisfaction.. at least for me..

So I wonder do others have that sense about other things that they seems to be inextricable drawn to on their own..