! My daughter is 16 with a mistemenor drug charge for 2 grams of marijuana ' what will happen in court?

2 grams is a small amount.
Where was she when she was caught? What state, if the US?
Laws vary by state.

It depends on the mood of the court and the persistence of the prosecutor. The prosecutor may prosecute to the fullest to get her to identify her supplier.

Bottom Line its not a question we can answer, especially with such scant info.