Question | Answer |
What are minutiae? | unique features on a fingerprint |
How many unique features are found on most fingerprints? | about 150 |
List the three main fingerprint patterns or classes | loops, whorls, and arches |
What are the groups or types of arches? | plain arches and tented arches |
What are the groups or types of loops? | right slant and left slant loops |
What are the groups or types of whorls? | central pocket, plain whorl, double loop, accidental |
What is a delta in a fingerprint? | the place where ridge patterns divide |
What are the 3 principles of fingerprints? | 1 - fingerprint patterns do not change during a person's lifetime
2 - fingerprints are unique to each person
3 - fingerprints can be put into classes and categorized |
What percent of fingerprints are loops? | 60 - 65% |
What percent of fingerprints are whorls? | 30 - 35% |
What percent of fingerprints are arches? | About 5% |
What is a latent fingerprint? | Prints invisible to the naked eye made by sweat and oils on the skin |
What is a visible print? | Prints created by ridges touching a colored material such as blood, paint, grease, or ink |
What are plastic prints? | Prints left in soft material such as wax, soap, dust. |
What is the core of a fingerprint? | the center part of a fingerprint pattern |
What materials make up a fingerprint that has been left on a surface? | water, oils, salts - also known as sweat |
What is a delta in a fingerprint? | Areas where the ridges run in opposite directions. |
What are ridges in a fingerprint? | The raised area that leaves a pattern. |