DNA Evidence and Its Reliability

The video explores the reliability of DNA evidence in criminal cases, highlighting its strengths and limitations. It discusses challenges faced by analysts, such as degraded or mixed samples, and the potential for errors. Technological advances may improve accuracy but also introduce new issues. A case study of Lucas Anderson illustrates how DNA transfer can lead to wrongful arrests, emphasizing the need for careful interpretation of DNA evidence.

What is the main reason the narrator gives for the hypothetical arrest scenario?

• The person was at the crime scene.

• The person had a motive for the crime.

• The person confessed to the crime.

• The person's DNA was found on the victim.

Why is DNA considered a reliable form of evidence?

• It is more conclusive than other forensic sciences.

• It is always perfect and easy to interpret.

• It can be easily manipulated.

• It is the only form of evidence used in court.

What is an electropherogram used for?

• To measure blood pressure.

• To analyze DNA samples.

• To detect fingerprints.

• To record voice samples.

What challenge do analysts face with degraded DNA samples?

• They are always contaminated.

• They are always perfect and easy to interpret.

• They can be hard to distinguish from other samples.

• They are never used in investigations.

Why might some labs choose not to analyze certain DNA samples?

• The samples are too easy to interpret.

• The margin of error is higher with small samples.

• The samples are too expensive to analyze.

• The samples are too large.

What potential future challenge is mentioned regarding DNA analysis?

• DNA samples will become too large to handle.

• DNA will no longer be used in court.

• DNA analysis will become obsolete.

• Analysts may detect genes from a single cell.

How can DNA end up at a crime scene even if the person was never there?

• DNA can be invisible.

• DNA can be teleported.

• DNA can be created artificially.

• DNA can be transferred through shared objects.

What was the key factor that led to Lucas Anderson's wrongful accusation?

• His DNA was transferred via medical equipment.

• He had a motive for the crime.

• He was seen at the crime scene.

• He confessed to the crime.

How long was Lucas Anderson in jail before the mistake was discovered?

• Three months

• One month

• Five months

• Seven months

What lesson can be learned from Lucas Anderson's case?

• DNA evidence can sometimes lead to wrongful accusations.

• DNA evidence should be the only evidence considered.

• DNA evidence is infallible.

• DNA evidence is always easy to interpret.