Hair structure
These are proteins that form the main structure of hair.
Keratin
If hair is bleached, this is the color it looks like under a microscope.
Yellow
The actively growing root of a hair that contains DNA and living cells.
Hair Follicle
The hair stage where the follicle if dormant hairs and hairs can fall out.
Telogen
Skin layer just below the skin surface.
Epidermis
Pigment found in the cortex of hair.
Melanin
If hair has been colored, these two layers of hair are colored.
Cortex and cuticle.
You can determine if someone is taking these from the chemical analysis of hair.
Drugs
the stage where the follicle is growing and the cells around it are dividing and depositing materials.
Anagen
Forensic scientists collect this many hairs from the scalp of the suspect.
50
This is the outer layer of hair that has overlapping scales.
Cuticle
Animals have a medullary index that is greater than this number (looking for a fraction or percentage).
1/2
Mrs. Smith gathered hair from a crime scene. When looking under a microscope, she noticed there was not a root. What kind of DNA can she process?
Mitochondrial
A resting phase; hair is not growing.
catagen
Hair grows about _____ per month.
1 cm
This is the inner layer of hair that is made of keratin and contains pigment.
Cortex.
This classification of medulla big spaces in between each segment.
interrupted
When mitochondrial DNA is collected from hair, who can this be traced back to?
Relatives connected through their mother.
Medullary index for humans is usually less than this (fraction or percentage).
1/3
4
This is the inside layer of hair that runs down the cortex.
Medulla
Would you be more likely to see an animal medulla or a human medulla under a microscope?
Animal because the medulla is bigger
An individual
Animals and humans have different cuticle scales. Humans have this kind.
Imbricate
Name one way you can tell the difference between human hair and animal hair when looking under a microscope
medulla (animal is bigger)
Cuticle (humans only have imbricate)