What does the chain of custody refer to in forensic DNA analysis?

What does the chain of custody refer to in forensic DNA analysis?

• A. Documented, unbroken trail of evidence custody and transfer.
• B. A method for amplifying DNA.
• C. A process to adjust DNA concentration.
• D. A type of gel used.

Answer: (A)

Chain of custody is the documented, unbroken trail of evidence custody and transfer. In forensic DNA analysis, this record tracks every person who handles the evidence, the dates and times of possession, where the evidence has been stored, and how it has moved between collection sites, laboratories, and analysts. Keeping this chain intact is essential to preserve the sample’s integrity and to ensure the results are admissible in court, because it shows the evidence has not been altered, substituted, or contaminated. The chain of custody typically uses sealed packaging, tamper-evident seals, and custody logs with names, signatures, and time stamps for each transfer. While DNA analysis involves steps like amplifying DNA, adjusting concentration, or running gels, these are laboratory procedures; the chain of custody focuses on how the evidence is handled and documented from collection to presentation.

Chain of custody is the documented, unbroken trail of evidence custody and transfer. In forensic DNA analysis, this record tracks every person who handles the evidence, the dates and times of possession, where the evidence has been stored, and how it has moved between collection sites, laboratories, and analysts. Keeping this chain intact is essential to preserve the sample’s integrity and to ensure the results are admissible in court, because it shows the evidence has not been altered, substituted, or contaminated. The chain of custody typically uses sealed packaging, tamper-evident seals, and custody logs with names, signatures, and time stamps for each transfer. While DNA analysis involves steps like amplifying DNA, adjusting concentration, or running gels, these are laboratory procedures; the chain of custody focuses on how the evidence is handled and documented from collection to presentation.