Trait controlled by the both environment and genetic factor. Usually, multifactorial traits outside of illness result in what we see as continuous characteristics in organisms, especially human organisms such as: height, skin color, and body mass.
I recently took a drug test for a job. I tested positive for opiates in my urine. I do not and have never taken drugs of any sort other than alcohol. I dont take any prescription drugs, how is it possible that this happened. I hade consumed some beer about12 hours before the test.
Rating Newest Oldest. Best Answer: There are drug tests that can be performed that will specify the opiate in the system, and PM doctors use these tests all the time. A lab will be able to tell the doctor if there is Oxycodone and/or hydrocodone in your system, and at what levels of concentration.