Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Forensic Science > Study Guide Unit 3 > Flashcards

Study Guide Unit 3 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Patent

A

what’s left when you have some sort of liquid on your fingers, visible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Latent

A

made visible by using chemicals, traces of sweat, oil or other natural secretions on the skin, not ordinarily visible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Contaminated print

A

visible prints transferred onto smooth surfaces by blood or other liquids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Minutiae/Galton details

A

Core, ending ridge/ridge ending, short ridge, fork/bifurcation, delta, hook, eye, dot/island, crossover/bridge, enclosures, specialty, enclosure, enclosure spur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

John Dillinger

A

an American criminal who was perhaps the most famous bank robber in U.S history, he tried to burn his fingerprints off with acid, but the procedure wasn’t as successful as he hoped, he did robberies from 1933-1934

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Whorls

A

a pattern of spirals or concentric circles, a pattern in which one of the two deltas and in at least one ridge makes a turn through one complete circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the first type of whorl in which the pattern is the generic kind?

A

Plain whorl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the second type of whorl in which two deltas and at least one ridge make a complete circuit?

A

Central pocket loop whorl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the third type of whorl in which there are two separate loop formations with two separate and distinct sets of shoulders and two deltas?

A

Double loop whorl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the fourth type of whorl in which there are two deltas and a combination of two different types of patterns?

A

Accidental whorl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What percent of the population has whorls?

A

About 30%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Loops

A

a pattern in which one or more of the ridges enter on either side of the impression, recurve, touch or pass an imaginary line drawn from the delta to the core and tend to go towards the same side of the impression

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the first type of loop in which a fingerprint or palmprint pattern consists of a loop which opens toward the ulna side of the hand (toward the pinkie).

A

Ulnar loop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the second type of loop in which the pattern flows in the direction of the radius bone of the forearm (i.e., toward the thumb)?

A

Radiule/radial loop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What percent of the population has loops?

A

About 65%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Arches

A

a pattern in which ridges form a hill

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the first type of arch in which the friction ridges enter on one side of the print and flow out the other side with a rise or wave in the center?

A

Plain arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the second type of arch in which two independent ridges come together and form an angle?

A

Tented arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What percent of the population has arches?

A

About 5%

20
Q

William Herschel

A

began the collection of fingerprints and noted they were not altered by age

21
Q

Sir Edmond Richard Henry

A

developed the fingerprint classification system still used in the US

22
Q

How fingerprints develop

A

Basal layer grows faster than the layers above and below it, basal layer collapses and folds to form intricate shapes. Fingerprints are made of an arrangement of ridges, called friction ridges. Each ridge contains pores, which are attached to sweat glands under the skin.

23
Q

Eccrine glands

A

secretes largely water with both salts and amino acids. Found on palms of hands, feet. Most important for fingerprints.

24
Q

Sebaceous glands

A

secretes fatty or greasy substances, sprouts a hair

25
Q

Epidermis

A

outermost layer, provides a waterproof barrier

26
Q

Dermis

A

beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands

27
Q

Pore (from sweat gland)

(Location of sweat glands)

A

Most numerous in the palms and the soles, where they open on the summits of the papillary ridges

28
Q

Hypodermis (subcutaneous layer)

A

is made of fat and connective tissue. Insulates body, protects body from harm, stores energy and connects skin to your muscles and bones

29
Q

How to dust and lift for prints

A

adhere to both water and fatty deposits, choose a color that contrasts with background, use one rigid/non porous material such as glass, plastic or metal, dust, adheres to oil and sweat left behind

30
Q

How to fingerprint another person

A

Ink their fingerprints following the instructions on the 10 point card

31
Q

Ninhydrin reaction

A

reacts with amino acids to produce a purple color

32
Q

Ninhydrin surfaces

A

paper, tissue, clothing, porous surfaces

33
Q

Ninhydrin color development

A

purple blue print

34
Q

Silver nitrate reaction

A

reacts with chloride to form silver chloride, a material that turns grey when exposed to light

35
Q

Silver nitrate surfaces

A

wood, styrofoam

36
Q

Silver nitrate color development

A

black or reddish brown (under UV light)

37
Q

Cyanoacrylate reaction

A

“superglue” fumes react with water and other fingerprint constitutes to form a hard, whitish deposit

38
Q

Cyanoacrylate surfaces

A

household items, plastic, metal, glass

39
Q

Cyanoacrylate color development

A

white print

40
Q

Dusting powder surfaces

A

Glass, metal

41
Q

Principle of permanence

A

a fingerprint will remain unchanged during an individual’s lifetime

42
Q

Principle of uniqueness

A

an individual characteristic: no two fingers have yet to be found to possess identical ridge characteristics

43
Q

Principle of individuality

A

a fingerprint is an individual characteristic and no two fingers have identical ridge characteristics

44
Q

How/why are fingerprints found on objects that have been touched?

A

Fingerprints are made of an arrangement of ridges called friction ridges (dermals). Each ridge contains pores which are attached to sweat glands under the skin. You leave fingerprints on glasses, tables and just about anything else you touch because of this sweat

45
Q

What is multicellularity’s role?

A

makes possible a division of labor at the cellular level

Forensic Science (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions