Biology 2581B Study Guide - Quiz Guide: Extrusion, Ulna, Retina
2 May 2020
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Document Summary
Biometrics is the application of statistical analysis to biological data: fingerprints, eye (retina) scans, body measurements, facial patterns and voice patterns. Biometrics is most commonly used for identification or security. Fingerprints are one of the most common and trusted methods of identification. Fingerprint patterns serve three specific functions: extrusion of perspiration, tactile facility, provision of gripping surface. For forensic analysis we are interested in both the class characteristics and the individual characteristics. The class characteristics of the fingerprint patterns that are formed by the position of the friction ridges these patterns are common to all individuals and are referred to as 1st level detail. The loop fingerprints are the most common pattern accounting for 60% of all fingerprints. Ridges are not continuous, they show a number of ridge characteristics (or second level detail). Ridge characteristics are used to individualise a fingerprint. Their position in relation to each other are used to determine if two prints match.
