Studied by 3 people
test tmr 25 mcqs/frqs but a question bank of 40
What cuticle pattern is shown? *Hint: from a human or dog
Imbricate
What type of evidence is a manufactured fiber such as polyester classified as?
Indirect, Physical, Chemical, Class, Trace
What is the part of the hair that extends out of the skin and is visible?
Hair shaft
What is true about fiber #5?
It was manufactured in a lab.
Which of the following is false?
Fibers are collected using a lint roller
Fibers that have a cuticle are from an animal
Fibers that are perfect in appearance are manufactured
Damaging tests are always done on fiber evidence
Damaging tests are always done on fiber evidence
What type of evidence is hair if it does NOT contain the hair follicle? Select all that apply.
Indirect, physical, biological, class, and trace
Hair is helpful in solving old crimes because…
hair does not easily decompose
In order to determine if a hair is from an animal or human, one should divide the diameter of the...
medulla by the width of the cortex (hair)
The tough clear outside covering of a hair shaft is
cuticle
Which part of the hair contains the nuclear DNA?
Hair follicle (Root)
Which fibers are natural? (select all that apply)
Animals, plants, and minerals
What is A?
Cuticle
What is hair packaged in?
Paper bindle
Which DNA helps determine all of a person's family relationships?
Nuclear DNA
Which of the following defines Locard’s Exchange Principle?
Whenever objects/people come in contact with another object/person, there is always an exchange of material
What evidence is hair if it contains the follicle?
Individual
Human or animal hair? Medullary index = 0.5 microns
Animal
The medullary index of human hair is ________ the medullary index for most other animals.
Less than
What is true about fiber #3?
It is natural because it isn’t uniform in color or appearance
Which of the following is false?
#5 is a plant fiber - it’s too straight to be natural (manufactured fiber)
The medullary index of a hair is 0.29. Human or animal?
Human
A sample of hair was found without a root. The hair analysis may be used to determine all of the following except:
identity of the individual from which the hair came from
What type of evidence is hair without the follicle considered?
Class
What is B?
Cortex
Which DNA helps determine some of a person's family relationships but only though the mother's side?
Mitochondrial DNA
The following information can be determined from hair analysis EXCEPT-
Age
When collecting hairs from a suspect to compare to those found at a crime scene, how many control hairs should be collected?
50 from head
Which of the following is a natural fiber? (select all that apply)
Silk, polyester, cotton, and wool
Silk, cotton, and wool
A suspect sat on a couch and picked up dog hair from a friend's house. He then went to a mall where he attacked a man and one of the dog hair fibers was transferred during the attack. What type of transfer is on the victim?
Secondary
We know hair is from a human if…
The medullary index is 0.33 or less
Hair is collected using?
Forceps
The central core of the hair is called the...?
Medulla
Where does mitochondrial DNA come from?
The mother
When being compared to a wooden pencil, which part of hair represents the lead? (central core of the hair)
Medulla
Two red fibers were collected from the blue shirt of a victim. Which of the following tests should a forensic scientist perform?
Microscopic analysis only
Diameter of the medulla is 0.2 microns and diameter of the hair is 0.4 microns. What is the medullary index?
.5 Microns
What is true about fiber #1?
It is from an animal
Identify the type of cuticle labelled as B commonly found in rodents and bats
Coronal
What must be present in a hair sample to obtain nuclear DNA?
Follicle
What is a fiber?
The smallest unit of a textile
Note 
Flashcard (20)