Online Masters Degree Education

Forensic Science degree program, with Masters in Forensic Psychology?

Since I do not have a B.S. degree in Criminal Justice (my B.S. degree is in Business) I am hoping a few people with experience in teaching Criminal Justice at the undergraduate or graduate level can help me.

I desire to go into Forensic Psychology at the Masters level. I may need to take a few lower level classes in psychology since I've been a business major for the last 7 years.

However, If I go into Forensic Science at the PhD level, what will I need to do (as in classes) to better prepare myself (after I attain my Masters)? I know that the psychology would help me.

Would a certain class in math help, perhaps calculus? Would taking physics or chemistry be a requirement to obtain a undergraduate degree in Forensic Science?

(If physics or chemistry is requirement at the undergraduate level, I better take it now).

My mind works in details and I know that I know that I know that I want to do investigative work. I analyze like crazy. Any information would help greatly.
Thanks!

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