1) A gene shown by the microarray to be expressed is :   definitely making protein   "probably making protein, but a protein expression analysis would be needed to know for sure"   probably making protein but there's no way to know for sure   definitely not making protein 2) In the application of this technique to skin cancer, a gene that has gone bad "   "may or may not be identified at all, but the overall pattern of results can give important clues"   can almost always be identified via DNA microarray