Depends.
I'm guessing you mean 2 mg (milligrams) of subutex rather than mL (milliliter)?
If you are Dependant on morphine, than taking the subutex on top of it, without waiting a good 24 hours is a bad idea, as it will cause precipitated withdrawal (subutex, or buprenorphine-the active ingredient, is a partial agonist opioid which can act like an antagonist by causing precipitated withdrawals if taken before withdrawals from a full agonist occur). However, if you take the morphine after 2mg of subutex, you will still most likely feel the morphine, though it depends on dosage and ROA (route of administration). For instance, I doubt that taking 10mg of oral morphine will have much effect on top of the buprenorphine due to morphines low oral absorption. But the same dose taken intravenously would most likely produce effects (not that I'm suggesting you shoot up morphine).
If you are naive to opioids/opiates in general, I would be careful with both of these drugs as they are rather potent. Especially with the morphine as you don't know how much you even have. Buprenorphine is also incredibly strong, and many people make the mistake of taking large dosages because they think it's not a "real opiate" due to the fact that it's only a partial agonist. If you have little to no tolerance, I wouldn't take more than .25mg of bupe at a time, and make sure to wait at least an hour for it to kick in before deciding to up your dose.