How do you determine right and wrong?

I think it's a bit of both,the upbringing and the genes.I read a story quite similar to the event you described.There were two brothers living in a family where they didn't have one happy momory.Their father would come drunk and beat up their mother and both the kids.They would be punished for faults they never committed.The only refuge they had was their school and even there they were teased about their parents.Time passed and both of them grew up to become different individuals.One became a diplomat for his country ,cultured ,sophisticated and a true gentleman.The other was an utter failure ,drinking his way to oblivion.When a study was done on the diplomat and his family ,they questioned both the brothers separately.The diplomat narrated the conditions in which they were brought up and asked " How could I have been any different than I am "? The other brother also narrated the miseries of his childhood and asked "How could I have been any different than I am " ? I think a lot of us become what we do inspite of our positive influences and upbringing and a lot of us also become what we do despite of our upbringing.It depends on what we choose to see.

Make sure that the facts broadcasted on that show are true enough to believe. In case of the ability to decide whether something is wrong or right is by birth. As a child we can better tell what is wrong or what is right rather than grown ups! I'd advise you to read bible, the best book on earth about the benefits of good and losses of bad. It will CHANGE YOUR LIFE FOREVER!!!

I think that we all have a moral compasss engraved upon our hearts...but, environment and other outside influences can either enhance and re-enforce our values o f right and wrong, or likewise they can "help" to subdue our compunction and desensitize us to the whispering of our conscience to where it is no longer heeded.