Fingerprints

Question 1

Fingerprints are formed from the ridges on the end of each finger called

Answer 1

Dermal Ridges

Question 2

An anatomist, __________, first attempted to classify fingerprint characteristics in _____

Answer 2

Marcello Malpighi, 1686

Question 3

In _____, British surgeon______ began to develop a system of ______

Answer 3

1870, Dr. Henry Faulds. identification using printer’s ink

Question 4

Fingerprints have become

Answer 4

a legally accepted of identification method since the 1900s.

Question 5

Percentage of population with fingerprints

Answer 5

60% loop, 35% whorl, and 5% arches

Question 6

Typelines

Answer 6

Ridges that diverge, usually splitting around another object within the fingerprint, such as a loop.

Question 7

Deltas

Answer 7

Ridge points found nearest the point at which type lines diverge.

Question 8

Core

Answer 8

the approximate center of the fingerprint pattern

Question 9

Plain Arch

Answer 9

ridges enter from one side of a print and exit on the other without much variation or interruption

Question 10

Tented Arch

Answer 10

sharp rise and fall in the center

Question 11

Radial Loop

Answer 11

ridges flow towards the thumb

Question 12

Ulnar Loop

Answer 12

ridges flow towards the little finger

Question 13

Plain Whorl

Answer 13

forms a complete circle, if the line touches any part of the complete circut

Question 14

Central Pocket Whorl

Answer 14

plain whorl, but the line does not touch any part of the complete circuit

Question 15

Double Loop Whorl

Answer 15

More than one loop

Question 16

Accidental Whorl

Answer 16

Doesn’t fit any classification

Question 17

Radius

Answer 17

bone nearest the thumb

Question 18

Ulna

Answer 18

bone nearest the small finger

Question 19

Minutia

Answer 19

Smaller details required to identify fingerprints

Question 20

Average person has

Answer 20

150 unique ridge details, but about 10 to 15 must be identified to match a fingerprint to a person

Question 21

Patent Prints

Answer 21

visible prints caused by a finger (blood, ink, paint), can be taken with tape

Question 22

Plastic prints

Answer 22

molded prints, impressions left behind in a material (wax, clay, soap), can be captured through casting

Question 23

Latent Prints

Answer 23

Can’t see them, can be found with dusting (carbon powder for light items, aluminum powder on dark items, flourescent powders with UV) or fuming

Question 24

Fuming

Answer 24

Iodine sublimes at room temp, which means it will change directly from solid to vapor. It dissolves in skin secretions (oils) that form on the print, resulting in a brown image of the print. Iodine fades overtime, so the print has to be photographed immediately.
Some use cyanocrglate (superglue)(used to make white prints) and ninhydrin (chemical used in amino acid detection) (purple fingerprint, reacts with amino acids and proteins present in skin secretions)

Question 25

AFIS

Answer 25

Automated Fingerprint Identification System; stores fingerprint images & archives them, scanning.