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WorksheetsCh. 3 Hair as Evidence Test
Total questions: 75
Worksheet time: 3hrs 30mins
A network of blood vessels that supply nutrients to feed the hair and help it grow is called the:
Papilla
Medulla
Follicle
Follicular Tag
Cortical Fusi
The club-shaped structure in the skin from which hair is produced is the:
Papilla
Medulla
Follicle
Follicular Tag
Cortex
The gland which secretes oil and causes hair to be oily is the:
Sebaceous gland
Apocrine gland
Eccrine gland
Adrenal gland
Pineal gland
Muscles that cause hair to stand upright are called:
Papilla muscles
Medulla muscles
Follicle muscles
Erector muscles
Cortical muscles
Small sacs of air within the hair shaft are called:
Papilla
Medulla
Follicle
Follicular Tag
Cortical Fusi
The central core of the hair is the:
Cuticle
Medulla
Follicle
Cortex
The layer of hair that contains pigment granules is the:
Cuticle
Medulla
Follicle
Cortex
The part of hair which can be analyzed for DNA is the:
Cuticle
Medulla
Follicle
Follicular Tag
Cortex
The transparent outer layer of the hair is the:
Cuticle
Medulla
Follicle
Cortex
Hairs from this racial group usually have a round cross section and a large diameter:
African
Asian
European
Hairs from this racial group usually have dense, unevenly distributed pigment granules :
African
Asian
European
Hairs from this racial group usually have evenly distributed pigment granules:
African
Asian
European
The type of microscope that uses light to indicate the presence of dyes is a(n):
Electron microscope
Fluorescence microscope
Comparison microscope
Compound light microscope
The type of microscope that views side by side images of hair samples is a(n):
Electron microscope
Fluorescence microscope
Comparison microscope
Compound light microscope
The type of microscope that provides incredible details of the surface or interior of a hair sample is a(n):
Electron microscope
Fluorescence microscope
Comparison microscope
Compound light microscope
A technique that can determine the composition of up to 14 different elements in a single strand of human hair is:
Fluorescent Spectrophotometry
Neutron Activation Analysis
Scanning Tunneling Test
Polarizing Electrophoresis
How often does a full head of hair get replaced?
Every year
Every other year
Every third year
Every four years
People with different colors of hair tend to have different amounts of hair. Which shows the correct order of hair colors from most to least head hairs?
Brunette > Blonde > Red Head
Blonde > Brunette > Red Head
Blonde > Red Head > Brunette
Red Head > Brunette > Blonde
Red Head > Blonde > Brunette
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?
Primary Transfer
Secondary Transfer
Direct Transfer
Indirect Transfer
Hair analysis may be used to determine all of the following except:
body region from which the hair came from
identity of the individual from which the hair came from
broad racial background of the individual from which the hair came from
manner in which the hair was removed
hair analysis is helpful to determine all of the above
Hair analysis may be used to determine all of the following except:
an assessment of nutritional deficiencies
a history of the use of drugs and other toxins
where the hair originated; human or other animal
presence of heavy metals
hair analysis is helpful to determine all of the above
The main purpose of hair is to:
Protect against sunlight
Aid in sensory
Decrease friction
Regulate body temperature
Humans have the most hair on their body…
When they are born
During puberty
Once they reach sexual maturity and adulthood
During old age, before they die
The hair shaft is composed of what important protein?
Myosin
Keratin
Chitin
Actin
This layer of hair is made of scales that overlap and point toward the distal tip:
Medulla
Cuticle
Follicular tag
Cortex
Human hairs generally have what two types of medulla?
Continuous or interrupted
Fragmented or none
Fragmented or solid
Solid or interrupted
When hairs found at a crime scene look similar to those collected from a suspect, a forensic expert should say:
“They are a match”
“They rule out the suspect”
“They corroborate the evidence”
“They could have a common origin”
When hairs found at a crime scene look very different from hairs collected from a suspect, this is called:
Association
Exclusion
Inconsistency
Negative identification
When collecting hairs from a suspect to compare to those found at a crime scene, how many control hairs should be collected?
100 from all over the body
75 from head; 25 from pubic region
50 from head; 25 from pubic region
25 from head; 75 from arms, legs, and pubic region
The average hair grows how much per month?
.5 cm
1.3 cm
2.4 cm
3.2 cm
Human hair has which type of cuticle?
imbricate
spinous
coronal
mosaic
Which factors are used to calculate the medullary index of the hair?
diameter of cuticle and the length of the hair
width of cortex and the width of the medulla
length of entire hair and the pattern of pigmentation
width of medulla and the width of the hair
Rodent and bat hair has which type of cuticle?
imbricate
spinous
coronal
mosaic
What is the first step in testing the hair shaft for substances such as drugs?
burning the hair
bleaching the hair
dissolving the hair
washing the hair
Hair without the root is considered what type of evidence?
class
direct
individual
physical
The above diagram represents which medulla pattern?
continuous
interrupted
fragmented
solid
When being compared to a wooden pencil, which part of hair represents the wood?
medulla
cortex
cuticle
follicular tag
What are the two main parts of a hair?
follicle and shaft
cuticle and cortex
DNA and melanin
medulla and follicular tag
What macroscopic characteristic can we determine by looking at the cross-section of head hair?
Hair length
Curl
Texture
Length of time since the last hair cut
Hair is helpful in solving old crimes because…
hair on a suspect never changes
it always contains DNA evidence
it takes little room to store in evidence closets
it does not easily decompose
When collecting hair as evidence, a detective should not:
Pluck hairs from the suspect’s head
Cut hairs from the suspect’s head
Collect loose hairs from the suspect’s head
None- A detective should do all of the above.
How long does it take for newly cut hairs to take on an uncut, rounded shape?
4-5 days
2-3 weeks
1 month
3 months
We know hair is from an animal if…
The medullary index is 0.5 or greater
The medullary index is 0.33 or less
The cuticle is coronal
The medulla is fragmented
This is the shortest stage of the life cycle of hair; accounts for about 2% of all hair growth and development:
Catagen
Telogen
Anagen
The period of active growth during the life cycle of hair; occurs when the cells around the follicle are rapidly dividing:
Catagen
Telogen
Anagen
Hair’s final resting stage during which the hair follicle is dormant and hairs are easily lost:
Catagen
Telogen
Anagen
The first and longest stage of the hair life cycle:
Catagen
Telogen
Anagen
The transitional or regressive stage of the hair life cycle, during which hair growth slows:
Catagen
Telogen
Anagen
About 12% of all hairs are in this stage, which lasts a few months:
Catagen
Telogen
Anagen
The image shows which distal tip hair shape?
Uncut
Scissor cut
Razor cut
Clippers
The image shows which distal tip hair shape?
Uncut
Scissor cut
Razor cut
Clippers
The image shows which distal tip hair shape?
Uncut
Scissor cut
Razor cut
Clippers
The image shows which distal tip hair shape?
Uncut
Scissor cut
Razor cut
Clippers
Which letter represents the cortex?
(a)
Which letter represents the cuticle?
(a)
Which letter represents the distal tip?
(a)
Which letter represents the follicle?
(a)
Which letter represents the follicular tag?
(a)
Which letter represents the medulla?
(a)
Which letter represents the shaft?
(a)
What type of pattern does the horizontal hair in the diagram have?
Lattice
Interrupted
Amorphous
Fragmented
Multiserial
What is the correct name for the scale pattern shown?
imbricate
spinous
coronal
mosaic
What is the correct name for the scale pattern shown?
imbricate
spinous
coronal
mosaic
What is the correct name for the scale pattern shown?
imbricate
spinous
coronal
mosaic
A spinous scale pattern is common in what animals?
monkeys, apes, humans
mink, seals, cats
skunks, raccoons, opossums
bats, mice, rats
In many mammals, hair can be very dense, and it is then referred to as:
(a)
Pigment which gives color to brown and black hair is called:
(a)
Pigment which gives color to blonde and red hair is called:
(a)
This type of medulla pattern is frequently found in the hairs of Native Americans and Asians:
continuous
interrupted
fragmented
solid
Bleaching hair removes pigment granules and gives hair this color tint:
(a)
Besides using your fingers or tweezers/forceps, what are two other methods of picking up hair at a crime scene? (use only a comma between your answers "answer 1, answer 2")
(a)
What two types of paper-made containers are best for packaging strands of hair evidence?
paper bindle
paper bag
small cardboard box
coin wrapper
What are the two types of hair most commonly found at crime scenes? (use only a comma between your answers "answer 1, answer 2")
(a)
Calculate the medullary index of a hair whose diameter is 167 µm wide and whose medulla measures 53 µm. (You may use a calculator. Round your answer to TWO DECIMAL POINTS)
(a)
A coronal scale pattern is common in what animals?
monkeys, apes, humans
mink, seals, cats
skunks, raccoons, opossums
bats, mice, rats
