Structure of Hair
The hair shaft is made up of these made parts.
medulla, cortex, and cuticle
Animals have a bigger ________ than humans
medulla
Which part of the hair contains DNA
the hair follicle
True or False: All hair found at hair from a single person will look the same.
False - hair from different parts of the body will look different.
This is the part of the hair that is attached to the root and can be used for DNA evidence.
The hair follicle
Humans have a larger __________ than animals
Cortex
What makes testing the hair follicle for DNA one of the best options.
3 answers your team will get 200 points for each correct answer.
It is quick and cost effective.
You can use it for blood typing
It can be used for DNA testing with a high success rate.
Why can hair growth be used to identify the age of a dead body.
Hair continues to grow even after a person has passed away.
This is the thickest part of the hair shaft and is what gives the hair color.
the cortex
Animals can have cuticles that can be arranged in a spinous, coronal, or imbricate patterns. What is the most common cuticle pattern for humans?
Imbricate
What type of evidence is the hair shaft?
class or individual evidence.
Hair can be used to identify this piece of class evidence using broad characteristics.
Race/Ethnicity
This the outermost part of the hair and serves the function of protecting the hair.
The cuticle
This is the ratio of width of cortex to the width of the medulla.
the medullary index
Class or Individual
Individual
When dyeing your hair which parts of the hair gets colored?
the cuticle and the cortex
This is the main protein that makes up the hair shaft.
Keratin
You find a hair that has a medullary width of 44 micrometers and a cortex width of 124 micrometers.
Did this hair come from an animal or human?
What was the medullary index of the hair
human
medullary index of .35
What type of DNA is found in the hair shaft?
What type of DNA is found in the hair follicle?
Hair Follicle - nuclear DNA
A body is found in the Grand Canyon in an area where hikers known to occasionally go missing. At the start of the trip the hiker had shaved his head. The average hair growth rate is .35mm in a day and the hiker's hair was 9.45mm long.
How long was the hiker missing for.