Forensic Science: DNA Evidence

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What is DNA evidence?

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DNA evidence refers to biological material that contains genetic information, which can be used to identify individuals involved in a crime.

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What are restriction enzymes?

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Restriction enzymes are proteins that cut DNA at specific sequences, allowing scientists to manipulate DNA for various applications, including forensic analysis.

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How should biological evidence, such as blood, be stored?

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Biological evidence should be put into breathable containers to prevent degradation and contamination.

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What is the significance of chromosomes in DNA analysis?

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Chromosomes carry genetic information; humans have 46 chromosomes (23 from each parent), which are crucial for determining familial relationships.

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What is the role of DNA profiling in forensic science?

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DNA profiling is used to identify individuals by analyzing unique patterns in their DNA, helping to link suspects to crime scenes.

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

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PCR is a technique used to amplify small amounts of DNA, making it easier to analyze and compare samples.

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What is mitochondrial DNA and its relevance in forensics?

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Mitochondrial DNA is inherited maternally and can be used to trace lineage and identify individuals when nuclear DNA is not available.

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What is the difference between nuclear DNA and mitochondrial DNA?

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Nuclear DNA is found in the nucleus and contains genetic information from both parents, while mitochondrial DNA is found in mitochondria and is inherited only from the mother.

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What is a DNA database?

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A DNA database is a collection of DNA profiles that can be searched to find matches, aiding in criminal investigations.

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What is the importance of chain of custody in forensic evidence?

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Chain of custody ensures that evidence is properly collected, preserved, and documented, maintaining its integrity for legal proceedings.