Which of the following would NOT be true of cDNA produced using human brain tissue as the starting material? Which of the following would NOT be true of cDNA produced using human brain tissue as the starting material? It could be labeled and used as a probe to detect genes expressed in the brain. It lacks the introns of the pre-mRNA. It could be amplified by the polymerase chain reaction. It was produced from pre-mRNA using reverse transcriptase.