Human vs Animal
The feature of hair most important in making a species identification
What is the scale pattern or medulla?
What layer is directly next to the medulla?
What is the cortex?
Microscopic hair comparisons must be regarded by police and courts as ___________ type of evidence.
What is presumptive?
Regulates body temp., decrease friction, protects against sunlight &/or acts as a sense organ
What are 3 functions of hair?
The root shape of an animal hair shaft is ______.
What is spear shaped?
The cat hair medulla is often described as resembling this
What is a string of pearls?
The central canal running through many hairs is called this.
What is the medulla?
The tissue of hair necessary for DNA analysis.
What is follicular tissue?
The hair shaft is made up of these 3 layers.
What are the medulla, cortex and cuticle?
This layer of the hair shaft gives it shape.
What is the cortex?
Animal hair is __________ towards the medulla.
What is denser?
The part of a hair that contains its scales.
What is the cuticle?
In making hair evaluations, it is best to view this part of the hair using a microscope.
What is the medulla?
Coronal, Spinous and Imbricate
What are the three basic patterns of the cuticle?
Dyed hair 3 cm from the root means the hair has grown for this length of time.
What is 3 months?
Animal hair can be best distinguished from human hair by examining this?
What is the medulla
What is the typical medullary index for human hair?
What is less than 1/3 cms?
Doing analytical testing using hair can detect usage of __________.
What are drugs?
What animal has coronal hair cuticles?
The mouse
The average length of human hair growth per month.
What is 1 cm/0.5 inch?
Human medulla may be classified as interrupted or absent, fragmented, or this.
What is continuous?
A cast of a hair surface can be made using one of these 2 materials: softened vinyl and____________.
What is clear nail polish?
Human hair root that has been forcibly removed versus just fallen out.
The hair root looks different. (Fallen out = rounded hair root, Forcibly removed = frayed or wavy looking hair root)
The hair root contains _______ type of DNA, Whereas the hair shaft contains ________ type of DNA.
What are nuclear DNA & mitochondrial DNA?