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Hair Evidence

Total questions: 55

Worksheet time: 1hrs 25mins

Name
Class
Date
1.

DNA is never present on hair

a)

False

b)

True

2.

Is it possible to determine what body part hair evidence came from?

a)

yes

b)

no

3.

Can race origin be determined by hair?

a)

Yes

b)

no

4.

Can we tell if a hair was forcibly removed?

a)

Yes

b)

no

5.

Is it possible to determine the species of hair evidence without DNA?

a)

Yes

b)

no

6.

What are the tree stages of hair growth in order from start to end?

a)

Anagen, telogen, and catagen

b)

anagen, catagen, and telogen

c)

telogen, catagen, and anagen

d)

catagen, telogen, and anagen

7.

Humans lose approximately how many hair per day?

a)

100

b)

1000

c)

50

d)

5

8.

Which letter in the diagram represents the cuticle?

a)

A

b)

D

c)

B

d)

F

9.

Which letter in the diagram represents the medulla?

a)

C

b)

A

c)

B

d)

D

10.

Which letter in the diagram represents the cortex?

a)

B

b)

A

c)

C

d)

D

11.

What medullary pattern is represented in the diagram?

a)

Fragmented

b)

interupted

c)

continuous

d)

not visible

12.

The growth cycle of human hair ranges from?

a)

2 to 6 years

b)

1 to 2 years

c)

3 to 6 months

d)

20 years

13.

What type of medulla pattern is shown here?

a)

continuous

b)

fragmented

c)

stacked

d)

interupted

14.

What are the three cuticle patterns?

a)

Coronal, spinous, imbricate

b)

flowery, circular, triangular

c)

square, round, diamond

15.

When processing hair found at a crime scene, we must determine if the origin is:

a)

human or animal

b)

human or reptile

c)

reptile or mammal

d)

human or alien

16.

Which phase of hair grown cycle does the hair fall out naturally?

a)

Telogen

b)

anagen

c)

catagen

d)

none of the above

17.

What types of DNA can be found on the hair?

a)

Mitochondrial

b)

nuclear

c)

Both mitochondrial and nuclear

d)

none

18.

The main purpose of hair is to:

a)

Protect against sunlight

b)

Aid in sensory

c)

Regulate body temperature

19.

We know hair is from a human if the Medullary Index (MI) …

a)

The medullary index is 0.5 or greater

b)

The medullary index is 0.33 or less

c)

The cuticle is coronal

d)

The medulla is fragmented

20.

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 (break down)

21.

The hair shaft is composed of what important protein?

a)

Cellulose

b)

Chitin

c)

Peptidoglycan

d)

Keratin

22.

Hair is what type of evidence without the follicle?

a)

Class

b)

Individual

c)

unknown

d)

all of the above

23.
When evidence can only be associated with a group and never with a single source, that evidence is said to possess:
a)
Class categories
b)
Class characteristics
c)
Group categories
d)
Group characteristics
24.
Which scale pattern identifies human hair?
a)
Imbricate
b)
Coronal
c)
Spinous
d)
None of these
25.
The most important structure for the individualization of hair (identity).
a)
Medulla
b)
Cuticle
c)
Cortex
d)
Follicle
26.
Which scale pattern is indicated?
a)
Coronal
b)
Spinous
c)
Imbricate
d)
None of these
27.
Which scale pattern is indicated?
a)
Coronal
b)
Spinous
c)
Imbricate
d)
None of these
28.
Which scale pattern is indicated?
a)
Coronal
b)
Spinous
c)
Imbricate
d)
None of these
29.
Hair with a round cross section and a large diameter is classified as...?
a)
Asian
b)
African
c)
European
30.
comparison microscope
a)
a compound microscope that allows the side by side comparison of the samples, such as of hair or fibers
b)
material that connects an indivisual or thing to a certain group
c)
the tough outer covering of a hair composed of overlapping scales
d)
the centrel core of a hair fiber
31.
cortex
a)
the region of hair located outside of the medulla containing granules of pigments
b)
material that connects an indivisual or thing to a certain group
c)
a type of fibrous protein that makes up the majority of the cortex of a hair
d)
the tough outer covering of a hair composed of overlapping scales
32.
cuticle
a)
the tough outer covering of a hair composed of overlapping scales
b)
material that connects an indivisual or thing to a certain group
c)
a type of fibrous protein that makes up the majority of the cortex of a hair
d)
the centrel core of a hair fiber
33.
The oldest part of the hair is the:
a)
Middle
b)
Tip
c)
Root
d)
Shaft
34.
To determine the medullary index, you would ______.
a)
measure the diameter of the medulla and divide it by the diameter of the hair
b)
measure the diameter of the hair and divide it by the diameter of the medulla
c)
measure the length of the medulla and divide it by the length of the hair
d)
measure the diameter of the medulla and divide it by the diameter of the cortex
35.

How would you describe this cuticle?

a)

Absent

b)

Can't tell difference between the cuticle and cortex

c)

thick and dark

d)

continuous

36.

Pigment that gives hair its color...

a)
carotene
b)
hemoglobin
c)
melanin
d)
chlorophyll
37.

The period of active hair growth is called the ___ stage


a)
dormant
b)
telogen
c)
anagen
d)
catagen
38.
Did this hair fall out naturally, or was it forcibly removed?
a)
Fell out naturally
b)
Was forcibly removed
39.

Which type of distal tip is shown in illustration B?

a)

(cut with) clippers

b)

(cut with) razor

c)

(cut with) scissors

d)

uncut

40.

Which type of distal tip is shown in illustration D?

a)

(cut with) clippers

b)

(cut with) razor

c)

(cut with) scissors

d)

uncut

41.

Which type of distal tip is shown in illustration C?

a)

(cut with) clippers

b)

(cut with) razor

c)

(cut with) scissors

d)

uncut

42.

Which type of distal tip is shown in illustration A?

a)

(cut with) clippers

b)

(cut with) razor

c)

(cut with) scissors

d)

uncut

43.

Which of these methods can be used to collect hair as evidence?

a)

Forceps/Tweezers

b)

Tape Lift

c)

Vacuum

d)

Bare Hand

44.

What is the name of the muscles that cause hair to stand upright?

a)

Follicle

b)

Sebaceous

c)

Papilla

d)

Erector Pili

45.

Small sacs of air within the hair shaft are called...

a)

Cortical Fusi

b)

Cortex

c)

Follicular Tag

d)

Papilla

46.

While getting dressed, you dropped your shirt on the floor and picked up dog hair. When you arrived at school and sat in your desk chair, you transferred some of that dog hair to the chair. This is an example of what?

a)

Primary Transfer

b)

Secondary Transfer

c)

Tertiary Transfer

d)

Direct Contact

47.

When hairs found at a crime scene look similar to those collected from a suspect, a forensic expert should say:

a)

“They are a match”

b)

“They rule out the suspect”

c)

“They corroborate the evidence”

d)

“They could have a common origin”

48.

When hairs found at a crime scene look very different from hairs collected from a suspect, this is called:

a)

Association

b)

Inconsistency

c)

Exclusion

d)

Negative identification

49.

When collecting hairs from a suspect to compare to those found at a crime scene, how many control hairs should be collected?

a)

100 from all over the body

b)

75 from head; 25 from groin area

c)

50 from head; 25 from groin area

d)

25 from head; 75 from arms, legs, and groin area

50.

what are electron microscope used for

a)

measuring object

b)

magnification of 50000 times or more

c)

measuring weight

d)

none of the above

51.

how to tell human hair from animal hair ?

a)

patter of pigmentation

b)

medullary index

c)

cuticle type

d)

all the above

52.

type of hair characteristic for people of African ethnicity ?

a)

straight ,densely distributed and round large diameter

b)

generally straight or wavy , small and evenly distributed round diameter

c)

curly or coiled densely distributed flatten diameter

d)

none of the above

53.

how to tell if hair is dyed ?

a)

hair is stained only in cortex

b)

hair is only stained in medulla

c)

cuticle and cortex are stained

d)

looks different than from other hairs

54.

how to tell of hair is or was bleached ?

a)

looks white

b)

one strand of hair is 2 different colors

c)

hair looks to change color in sunlight

d)

hair lacks pigment in cortex and cuticle

55.

human hair consists of a -------- and a -----

a)

Follicle

b)

Shaft

c)

Medulla

d)

Cortex

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