DNA alt. assessment

Front

What is DNA evidence?

Back

DNA evidence refers to biological material that contains an individual's genetic information, which can be used for identification purposes in forensic science.

Front

Why is it important to avoid contamination when collecting DNA evidence?

Back

Avoiding contamination is crucial to ensure the integrity and reliability of the DNA sample, as contamination can lead to inaccurate results.

Front

What are the three main steps to establish a DNA profile?

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The three main steps are: 1) Extract the DNA from the sample, 2) Amplify the DNA using techniques like PCR, and 3) Analyze the DNA to create a profile.

Front

What is the first action to take when collecting DNA evidence at a crime scene?

Back

The first action is to wear gloves to prevent contamination of the evidence.

Front

What does electrophoresis do?

Back

Electrophoresis is a technique used to separate DNA fragments based on their size.

Front

What is the purpose of PCR (Polymerase Chain Reaction)?

Back

PCR is used to amplify small segments of DNA, making millions of copies for analysis.

Front

What are STRs (Short Tandem Repeats)?

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STRs are repeating sequences of DNA that are used in forensic analysis to differentiate between individuals.

Front

How can DNA evidence corroborate an alibi?

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DNA evidence can confirm or refute a suspect's presence at a crime scene, supporting or contradicting their alibi.

Front

What is the role of DNA profiling in criminal investigations?

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DNA profiling helps to identify suspects, link them to crime scenes, and exonerate innocent individuals.

Front

What is the significance of documenting evidence at a crime scene?

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Documenting evidence ensures a clear record of the scene and the evidence collected, which is vital for legal proceedings.