Problem:
I am wondering whether a behavioral trait (e.g. fear or stress experienced in the lifetime of the parent) can be transmitted genetically to its offspring.
I understand that a behavioral tendency for stress acquired through evolutionary time can be transmitted from parent to child, but I'm wondering whether a trait not present before can be transmitted between 2 generations.
For example many studies claim that offspring's of holocaust survivors inherit psychopathological disorders.
I'm wondering how this inheritance could occur genetically given such a short time period? Please explain.