system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If somebody has a physical trait that is a result of the environment, not genetics, is it possible that that individuals offspring could inherit that trait?

I know I'm a little late to the scene here, but I've recently become obsessed with Dexter.  In season three Dexter dreams that his son will become a serial killer, like he is.  Earlier in the show, a flashback of Harry showing Dexter his CT scan shows that Dexter's brain anatomy matches that of known serial killers.  Because Dexter wasn't born with this brain anatomy (presumably, because the show claims that seeing his mother's death is what caused him to become a serial killer) would it be likely that he'd pass it on to his children?
gpt
I don't think this is likely to be passed, but in general it is possible to inherit something that parents acquired during lifetime. It's because of epigenetic changes. For example if parents were malnourished in youth their children are most likely to become obese (like if they had to save the nutrients for a similar famine episode that happened to their parents). Most epigenetic changes occure in brain, but the field is still very young and it's hard to tell if our character features can depend of our parents character features.