WorksheetsHair and Fiber Review
Total questions: 53
Worksheet time: 27mins
Name
Class
Date
1.
How fast does your hair grow?
a)
1 inch per month
b)
2 inches per month
c)
1/2 inch per month
d)
2 inches per year
2.
The kind of DNA that only gives your family information, not individual information, is:
a)
Nuclear DNA
b)
Nuclear submarine
c)
Mitochondrial DNA
d)
Oranatangs
3.
The first man-made fiber was:
a)
Nylon
b)
Spandex
c)
Rayon
d)
Acetate
4.
Did this hair fall out naturally, or was it forcibly removed?
a)
Fell out naturally
b)
Was forcibly removed
5.
Fiber evidence is
a)
Individual Evidence
b)
Direct Evidence
c)
Class Evidence
d)
All of These
6.
What kind of medulla is this?
a)
Interrupted/Intermittent
b)
Continuous
c)
Fragmented
d)
There is no medulla present - Absent
7.
The middle layer of a hair (like the wood of a pencil) is the __
a)
medulla
b)
cortex
c)
cuticle
d)
keratin
8.
The deepest layer of hair (like the lead of a pencil) is the ___
a)
medulla
b)
cortex
c)
cuticle
d)
keratin
9.
The outside layer of a hair is the ___
a)
medulla
b)
cortex
c)
cuticle
d)
keratin
10.
The name for man-made fibers is:
a)
processed fibers
b)
synthetic fibers
c)
natural fibers
d)
modified fibers
11.
In which phase of hair growth is hair actively growing?
a)
anagen
b)
catagen
c)
telogen
d)
melanen
12.
Which phase of hair growth is the intermediate period of hair growth and lasts about three weeks?
a)
anagen
b)
catagen
c)
telogen
d)
melanen
13.
Which phase of hair growth is the final phase of hair growth that results in hair loss and lasts about three months?
a)
anagen
b)
catagen
c)
telogen
d)
melanen
14.
The first man-made fiber is
a)
cotton
b)
rayon
c)
silk
d)
nylon
15.
Fibers are classified as either:
a)
natural fibers or synthetic fibers.
b)
polymers or synthetic fibers.
c)
acrylic fibers or plant fibers.
d)
olefins or synthetic fibers
16.
Number 1 is pointing to what structure of the hair?
a)
Cortex
b)
Medulla
c)
Cuticle
d)
None of These
17.
Number 2 is pointing to what structure of the hair?
a)
Cortex
b)
Medulla
c)
Cuticle
d)
None of These
18.
Number 3 is pointing to what structure of the hair?
a)
Cortex
b)
Medulla
c)
Cuticle
d)
None of These
19.
What do we call the pigment in our hair?
a)
Melanin
b)
Cortical Fusi
c)
Cuticles
d)
Chlorophyll
20.
The following medullary pattern is called
a)
fragmented
b)
continuous
c)
interrupted/intermittent
d)
There is no medulla present - absent
21.
What kind of medulla is this?
a)
Fragmented
b)
Continuous
c)
Interrupted/Intermittent
d)
There is no medulla - Absent
22.
What kind of medulla is this?
a)
Fragmented
b)
Continuous
c)
Interrupted/Intermittent
d)
There is no medulla - Absent
23.
Did this hair fall out naturally, or was it forcibly removed?
a)
Fell out naturally
b)
Was forcibly removed
24.
What is the central canal running through the hair shaft called?
a)
Cortex
b)
Medulla
c)
Cuticle
d)
Shaft
25.
By far the most prevalent plant fiber is:
a)
Hemp
b)
Silk
c)
Cotton
d)
Linen
26.
What protein is hair composed of?
a)
melanin
b)
cortex
c)
keratin
d)
cerotine
27.
What scale type do we call number 1?
a)
Imbricate
b)
Spinous
c)
Coronal
d)
Crescent
28.
What scale type do we call number 2?
a)
Imbricate
b)
Spinous
c)
Coronal
d)
Crescent
29.
What scale type do we call number 3?
a)
Imbricate
b)
Spinous
c)
Coronal
d)
Crescent
30.
Did this hair fall out naturally, or was it forcibly removed?
a)
Fell out naturally
b)
Was forcibly removed
31.
Which one is an example of a synthetic fiber?
a)
Polyester
b)
Acrylic
c)
Spandex
d)
All of these
32.
Which part of the hair is made of overlapping scales that make up the outside covering?
a)
keratin
b)
cuticle
c)
medulla
d)
cortex
33.
What is the medullary index for most animals?
a)
at least 1/2 of the diameter
b)
it is exactly 1/2 of the diameter
c)
it is less than 1/3 of the diameter
d)
it is exactly 1/3 of the diameter
34.
Continuous, interrupted, fragmented and absent are all patterns of
a)
the cuticle
b)
the cortex
c)
the hair shaft
d)
the medulla
35.
What is the translucent piece of tissue surrounding the hair’s shaft near the root called?
a)
sebaceous gland
b)
root tip
c)
follicular tag
d)
cortex
36.
Hair is removed from a person during a struggle. Hairs that were in what phase of hair growth are most likely to provide the crime scene technician with DNA?
a)
anagen
b)
catagen
c)
telogen
d)
they all provide DNA
37.
A cast of a hair surface can be made using:
a)
an SEM (scanning electron microscope)
b)
clear nail polish
c)
softened vinyl
d)
play dough
38.
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
39.
Small sacs of air found within the cortex are called...?
a)
central embolism
b)
cortical fusi
c)
air granules
d)
oval bodies
40.
Cashmere comes from
a)
flax plants
b)
sheep
c)
goats
d)
rabbits
41.
What is the medullary index for a human hair?
a)
generally less than 1/3
b)
generally equal to 1/3
c)
generally more than 1/3
d)
generally greater than 1/2
42.
Why does the presence of a follicular tag have forensic importance?
a)
It may indicate when the hair was cut
b)
the scale pattern may indicate gender
c)
DNA may be extracted from the tag
d)
Its presents shows that the hair was shed naturally
43.
Which of these cannot be determined by microscopic hair analysis?
a)
gender
b)
human or animal
c)
race
d)
manner in which hair was removed (shed or pulled out)
44.
Which of the following is a manufactured fiber?
a)
Cotton
b)
Wool
c)
Nylon
d)
Silk
45.
The central canal running through many hairs is known as the:
a)
root
b)
cortex
c)
medulla
d)
shaft
46.
Pigment granules that impart hair with color are found in the:
a)
cortex
b)
medulla
c)
cuticle
d)
none of the above
47.
The medullary index of human hair is ________ the medullary index for most other animals.
a)
less than
b)
greater than
c)
the same as
48.
The layers of the hair shaft are the ___________, the ___________, and the ___________.
a)
cortex; mitochondria; pigment
b)
cuticle; cortex; medulla
c)
pigment; cortex; pigment
d)
cuticle;
root; medulla
49.
In making hair evaluations, it is best to view the hairs using a(n) ___________ microscope.
a)
comparison
b)
scannig electron
c)
visible light
d)
polarizing
50.
For standard/reference hair sampling from a victim, the collection of a minimum of ___________ full-length head hairs and ___________ full-length pubic hairs is recommended.
a)
50; 24
b)
100 ; 100
c)
5; 16
d)
20; 20
51.
What is used to separate the dye components of fibers?
a)
Birefringence
b)
Infrared
c)
Becke line
d)
Chromatography
52.
In order to identify a compared fiber what must be examined first?
a)
chemical makeup
b)
striations
c)
shape and length
d)
color and diameter
53.
Hair grows out of the organ of the skin called the
a)
follicle
b)
scalp
c)
pore
d)
dermis
100 %
