Question

cold case detectives are investigating a homicide that took place 30 years ago. in reexamining the evidence, they find a tiny spot of blood on the victims clothing that was likely left by the murderer. the dna in the blood has partially degraded over time. what technique(s) would the blood lab technicians use in their examination of this tiny, degraded blood sample? select all that apply. they would use pcr to amplify the dna. they would use a restriction enzyme and dna ligase to make recombinant dna from this sample. they would use reverse transcriptase - polymerase chain reaction (rt - pcr) to determine the genes expressed in this dna.

Explanation:

PCR (Polymerase Chain Reaction) is used to amplify small amounts of DNA, which is useful for a tiny, degraded sample. Making recombinant DNA is not relevant for just examining the sample. RT - PCR is used for RNA analysis and not the best choice for just analyzing the DNA in the blood sample.

Answer:

They would use PCR to amplify the DNA.