Reply to post:

I would argue that a learned experience can be genetically encoded and be passed on from generation to generation. This would be a great explanation for a root cause of irrational fears, such as arachnophobia and claustrophobia

I can quite easily imagine one of our ancestors being trapped in an encosed space after an earth quake and for that experience to be genetically encoded and manifest itself in the form of an irrational fear in later generations

DNA is very adaptable, and it does this through feedback of the environment

To disagree with this, is to ignore your own nature