Brainscape's Knowledge GenomeTM

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


See full index

Forensic BioScience > More Trace Evidence > Flashcards

More Trace Evidence Flashcards

1
Q

What are some examples of marks and impressions that can be left at the crime scene?

A 
Fingerprints
Footwear impressions
Bite marks
Tool marks
Tyre marks
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is dactyloscopy?

A

Study of fingerprint identification

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

What is the development of fingerprints?

A

Formation- early fetal life
Uniqueness- even identical twins have different fingerprints, 64 billion to 1 chance that individuals can have the same fingerprints
Persistance

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

What are the classifications of fingerprints?

A

Ridges and patterns- ridges for grip, lots of nerve endings, helps to keep you cool
Loops
Arches
Whorls

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

Approximately how many people in the population have loops?

A

60%

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

What are loops divided into?

A

2 groups- divided by direction loops slant

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

What are the two types of loops?

A

Ulnar Loop

Radial Loop

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

What is an Ulnar Loop?

A

This is the most common type of fingerprint

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

What is a Radial Loop?

A

The loop slants towards the radius (the thick bone of the thumb side of the hand)

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

What is important to remember about direction of loops?

A

Direction of loop would be opposite way round of the left hand

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

What percentage of people have arches?

A

approx 5%

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

What groups can arches be divided into?

A

Two groups-
Plain Arch
Tented Arch

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

What is a Plain Arch?

A

A mound like pattern

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

What is a tented Arch?

A

Looks like a church steeple

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

How many groups can Whorls be divided into?

A 
4 groups-
Plain Whorl
Central Pocket Whorl
Double loop Whorl
Accidental Whorl
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is plain whorl?

A

Circular spiral pattern

17
Q

What is a central pocket whorl?

A

A tight circular pattern in the centre of the fingerprint

18
Q

What is a double loop whorl?

A

Two looped patterns

19
Q

What is an accidental whorl?

A

An irregular circular pattern

20
Q

How can you identify a print?

A

Crime Scene

Sweat in fingers leaves impression

21
Q

What is the name for the surface a fingerprint is left on?

A

Substrate

22
Q

What is the name for the fingerprint?

A

Matrix

23
Q

What are the types of fingerprints?

A

Latent
Visible
Plastic

24
Q

What is a latent fingerprint?

A

Invisible to the naked eye

25
Q

What is a visible fingerprint?

A

Clearly seen, positive (leave a mark on surface e.g. mud or blood) or negative (e.g. thin snow, snow transferred to tyre)

26
Q

What is a plastic fingerprint?

A

3D prints e.g. soft surface, clay, deep mud, deep snow produce impression

27
Q

What is ACE-V?

A

Analysis- fingerprint powders, intelligence gathering
Comparison- compare fingerprint to database
Evaluation- determination of uniqueness to suspect
Verification- independent analysis by 2 fingerprint experts subjective fingerprints

28
Q

How can you recovery footprints?

A

Photograph, chemical, powders to highlight print, produce a cast if there is a 3D print

29
Q

What sources can you get bite marks for?

A

Food, suspect or victim, skin, objects i.e. apple, chocolate, small ridges of teeth, different patterns

30
Q

Who examines bite marks?

A

Forensic odontologist

31
Q

How do you preserve bite marks?

A

Cast (rubber base material), photographs

32
Q

How can you compare bitemarks with suspect?

A

Cast of suspect teeth, have a look at biting edges (clear film on bite source), DNA from saliva

33
Q

How can toolmarks be analysed?

A

E.g. saw, screwdriver
Comparison of marks
Microscopy

34
Q

What are tyre marks?

A

Formed from tread on tyres

35
Q

What can tyre marks lead to?

A

Information can lead to make and specification of tyre

Forensic BioScience (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions