Hair 1
Can a strand of hair alone (without the follicle) solve a crime?
No
What is most likely the result of hair bleaching
What is a yellowish tint?
There are multiple ways to collect fibers what are two of them?
tape/adhesive, vacuum, forceps
The two broad categories for fibers.
What are natural and synthetic
Why can hair with a follicle solve a crime?
It contains DNA. Which can be matched.
Most humans tend to have a medullary index of what?
Less than 0.3
What chemical test can we preform on unknown fibers?
Burn test
List the three types of natural fibers
plant, animal & mineral
How can human hair be classified as either class or individual evidence?
It can either have a root attached or not.
A medula that looks like a dotted line.
What is interrupted medulla
Fibers in forensics are considered what type of evidence?
Trace evidence
What kind of fibers are affected by microscopic organisms?
What is a natural fiber?
List the three main parts of the hair from the outside to the inside.
Cuticle, cortex, medulla
In the video we watched in class about Wayne Williams
list the type of hair that was discovered on both bodies and his home
His Dogs hair
What are two differences between animal hair and human hair?
Animals have a larger medulla, animals have drastic color changes, etc.
What characteristics of cotton make it a great source of fiber for clothing?
The Fibers are easily woven and dyed.
What fabric melts quickly when applied to a flame, is synthetic, puts off a chemical odor and creates white smoke?
Nylon
The period of active hair growth is called the _______ stage?
What is Anagen
Intermittent or interrupted medulla is a regular pattern, whereas this type of medulla has segments of irregular size/length and has very thin sections.
What is fragmented?
What fabrics ultimately led to the imprisonment of Wayne Williams? (name 2)
Green carpet fibers, purple bedspread, or yellow blanket.
List 3 different synthetic fibers
Nylon, polyester, polyester, rayon, etc.