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Questions and Answers
What type of impressions are left by the friction ridges of a human finger?
What type of impressions are left by the friction ridges of a human finger?
- Fingerprints (correct)
- Knuckle prints
- Palm prints
- Footprints
What results in fingerprints on surfaces such as glass or metal?
What results in fingerprints on surfaces such as glass or metal?
- Moisture and grease on a finger (correct)
- Using hand sanitizer
- Wearing gloves
- Excessive dryness of the skin
What do fingerprint records normally contain impressions from?
What do fingerprint records normally contain impressions from?
- The pad on the last joint of fingers and thumbs (correct)
- The upper arm
- The entire hand
- The wrist area
What makes human fingerprints suitable as long-term markers of human identity?
What makes human fingerprints suitable as long-term markers of human identity?
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What has been challenged by academics, judges, and the media regarding the use of fingerprint evidence?
What has been challenged by academics, judges, and the media regarding the use of fingerprint evidence?
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Study Notes
Fingerprints
- Fingerprints are left by the friction ridges of a human finger, which make contact with a surface.
Formation of Fingerprints
- Fingerprints on surfaces such as glass or metal result from the transfer of sweat and oils from the ridges on an individual's fingertips.
Fingerprint Records
- Fingerprint records typically contain impressions from the thumbs, index fingers, and middle fingers.
Uniqueness of Human Fingerprints
- The unique patterns of ridges and valleys on an individual's fingertips make human fingerprints suitable as long-term markers of human identity.
Challenges to Fingerprint Evidence
- The reliability and uniqueness of fingerprint evidence have been challenged by academics, judges, and the media.
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