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Trace Evidence

Total questions: 50

Worksheet time: 47mins

Name
Class
Date
1.

Which is NOT part of the hair shaft?

a)

medulla

b)

follicle

c)

cortex

d)

cuticle

2.

Which part of the hair contains the pigment that gives hair its color ?

a)

medulla

b)

cuticle

c)

follicle

d)

cortex

3.
The central core of the hair is called the...?
a)
Medulla
b)
Cuticle
c)
Cortex
d)
Shaft
4.

Hair analysis may be used to determine all of the following except:

a)

exposure to toxins or drugs

b)

body region from which the hair came from

c)

broad racial background of the individual from which the hair came from

d)

identity of the individual from which the hair came from

5.
When being compared to a wooden pencil, which part of hair represents the lead?
a)
medulla
b)
cortex
c)
cuticle
d)
follicular tag
6.
The hair follicle is dormant and hairs are easily lost during which stage of the hair life cycle?
a)
Anagen
b)
Telogen
c)
Catagen
d)
Metagen
7.
Hair is helpful in solving old crimes because…
a)
hair on a suspect never changes
b)
hair always contains DNA evidence
c)
hair takes little room to store in evidence closets
d)
hair does not easily decompose
8.
The hair shaft is composed of what important protein?
a)
Cellulose 
b)
Chitin
c)
Peptidoglycan
d)
Keratin
9.

Hair is what type of evidence?

a)

Class

b)

Individual

c)

unknown

d)

all of the above

10.

Can we tell if a hair was forcibly removed?

a)

Yes

b)

no

11.

What types of DNA can be found on hair that has been forcibly removed?

a)

Mitochondrial

b)

nuclear

c)

Both mitochondrial and nuclear

d)

none

12.

In order for hair to be considered individual evidence it must contain

a)

a complete medulla

b)

cells in its cortex

c)

nuclei in the cuticle

d)

a follicle with tissue attached

13.
Did this hair fall out naturally, or was it forcibly removed?
a)
Fell out naturally
b)
Was forcibly removed
14.
When fibers are transferred directly from victim to suspect or suspect to victim, this is called
a)
necessary transfer
b)
direct transfer
c)
absolute transfer
d)
secondary transfer
15.
The transfer of evidence such as a fiber from a source to a person, then to another person or object, is called
a)
primary transfer
b)
secondary transfer
c)
tertiary transfer
d)
direct transfer
16.

The region of a hair located outside of the medulla containing granules of pigment is called:

a)

the cuticle

b)

the cortex

c)

the hair follicle

d)

the outer medulla

17.

Hair viewed for forensic investigations is studied both microscopically and macroscopically. Microscopic characteristics include the

a)

pattern of the medulla

b)

pigmentation of the cortex

c)

types of scales on the cuticle

d)

All of these choices

18.

Since hair grows out of the skin, chemicals that the skin absorbs can become incorporated into hair. Ingested or absorbed toxins can be detected by chemical analyses of hair. These ingested or absorbed toxins include:

a)

arsenic

b)

lead

c)

drugs

d)

All of these choices

19.
Hair can be used to determine
a)
drug habits
b)
diet
c)
geographic history
d)
all of the above
20.

The central core of a hair fiber is called the

a)

medulla

b)

cuticle

c)

cortex

d)

shaft

21.

Whenever two objects are in contact, some transfer of material will occur. This is known as

a)

Transfer of Evidence

b)

Locard's Exhange Principle

c)

Simpson's Transfer Principle

d)

Principle of Contact

22.
The tough clear outside covering of a hair shaft is
a)
cuticle
b)
cortex
c)
medulla
d)
polymer
23.

Hair evidence would be categorized as what type of evidence?

a)

Individual and biological

b)

Individual and physical

c)

Class and biological

d)

Class and physical

24.

In the diagram above which letter would indicate the hair shaft?

a)

A

b)

B

c)

C

d)

D

e)

E

25.

In the diagram above, which letter would indicate the follicle?

a)

A

b)

B

c)

C

d)

D

e)

E

26.

In the diagram the layer in which I would observe the cuticle scale pattern would be indicated by the letter

a)

A

b)

B

c)

C

27.

In the diagram the cortex would be indicated by the letter

a)

A

b)

B

c)

C

28.

In the diagram the medulla would be indicated by the letter

a)

A

b)

B

c)

C

29.

In which layer would pigment granules be found?

a)

A

b)

B

c)

C

30.

Which sample would likely have nuclear DNA?

a)

A

b)

B

31.
Scientists use this test to analyze the dyes in fabric evidence:
a)
Stain test
b)
Solvent test
c)
Infrared Spectroscopy
d)
Chromatography
32.
Fibers are considered what kind of evidence? 
a)
Individual
b)
Class
c)
Direct
d)
Indirect
33.

What are the three layers of hair?

a)

Medulla, keratin, cortex

b)

Cuticle, medulla, keratin

c)

Keratin, cuticle, cortex

d)

Medulla, Cortex, and Cuticle

34.

Natural fibers can come from

a)

plants and animals only

b)

plants, animals and minerals only

c)

animals only

d)

plants only

35.
The name for man-made fibers is:
a)
processed fibers
b)
synthetic fibers
c)
natural fibers
d)
modified fibers
36.
Hair is helpful in solving old crimes because…
a)
hair on a suspect never changes
b)
hair always contains DNA evidence
c)
hair takes little room to store in evidence closets
d)
hair does not easily decompose
37.

A fiber made from a man-made substance such as plastic.

a)

Natural Fiber

b)

Synthetic Fiber

c)

Monomer

38.
Which part of the hair has scales on it?
a)
Cortex
b)
Medulla
c)
Cuticle
d)
Hair doesn't have scales
39.

The study of earth and soil science is called:

a)

forensic pathology

b)

forensic geology

c)

forensic botany

d)

forensic palynology

40.

Larger pieces of glass that fit together like a puzzle are considered:

a)

class evidence

b)

trace evidence

c)

individual evidence

d)

biological evidence

41.

Soil is what kind of evidence?

a)

trace

b)

transfer

c)

class

d)

all of these

42.

The technique that can determine the substances present in hair and their concentrations is:

a)

microscopic analysis

b)

neutron activation analysis

c)

thermal decomposition

d)

refractive index

43.

Which shows the correct way chemicals get into hair?

a)

blood supply to root to cortex

b)

cortex to root to blood supply

c)

root to blood supply to cortex

d)

root to blood supply to cuticle

44.

What type of DNA is found in the hair shaft?

a)

nuclear DNA only

b)

mitochondrial DNA only

c)

nuclear and mitochondrial DNA

d)

no DNA is found in the hair shaft

45.

Testing of fibers include:

a)

burning

b)

thermal decomposition

c)

chemical testing

d)

all of these

46.

What 2 things must be known to get a timeline of drug use from hair?

a)

length of hair and follicle

b)

follicle and cuticle pattern

c)

hair growth rate and length of hair

d)

cuticle pattern and hair growth rate

47.

Which hair would give the most information from its cortex?

a)

10 inch hair

b)

8 inch hair

c)

6 inch hair

d)

4 inch hair

48.

Fiber is class evidence. What can make fibers have more probative value?

a)

its potential uniqueness

b)

its color

c)

its cross-sectional shape

d)

its microscopic analysis

49.

Fiber evidence is commonly found at crime scenes and there are many types of fibers. The 2 main categories of fibers are:

a)

rayon and cotton

b)

spandex and acryllic

c)

synthetic and natural

d)

animal or plan

50.

Which of the following terms refer to a fiber's type of cross section?

a)

rayon and spandex

b)

wavy and straight

c)

natural and synthetic

d)

trilobal and dogboned

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