Hair and Fiber Flashcards
The absence of melanin creates what color of hair?
White
What are the different types of medulla patterns found in human hair?
Intermittent/Interrupted
Fragmented
Continuous
Stacked
Absent
What can you determine about an individual by examining their hair?
Human or Animal?
Race?
Origin of location on the body?
Forcibly removed or not?
Treatment with chemicals?
Drugs have been ingested or not?
How can you tell if a hair has been forcibly removed?
Naturally shed hairs have undamaged roots, whereas forcibly removed hairs have stretched or are damaged.
Why can’t a fiber be individualized to a particular piece of fabric?
Fibers have to be matched to the exact piece of clothing they came from for it to have an individual source; however, the chances of that happening are very minimal. Hence, they are classified as class evidence.
5 synthetic fibers
Polyester
Nylon
Acetate
Acrylic
Spandex
5 natural fibers
Silk
Cotton
Wool
Mohair
Cashmere
What is the most common type of synthetic fiber?
Polyester
What type of weave pattern does denim have?
Twill
How do you distinguish between human and animal hair?
The human hair cuticle is routinely imbricate.
A animal hair cuticle has varied scale patterns.
Human hair found at a crime scene is most likely to be in the:
telogen phase
Anagen Phase
Growing Phase
Catagen Phase
Transition Phase
Telogen Phase
Resting Phase
Nuclear DNA can be identified from:
hair root/follicle
3 basic scale patterns in hair?
Rat, Cat, Human
If there is no medulla in the hair being observed, it is said to be:
Absent
Middle Layer that provides strength to the hair
Cortex
Period in which the hair grows
Anagen
Color pigment found in the hair and skin
Melanin
Structure from which the hair grows
Follicle
Oil Glands
Sebaceous
Spongy interior core of the hair
Medulla
Period in which the hair dies
Catagen
