Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Forensics-Hair Terms

QuestionAnswer
Hair is what type of evidence? Class Evidence
Hair can reveal DNA from which side? Mothers side
What are the 3 layers of hair? Outer cuticle, cortex, medulla
3 Cuticle types Imbricate, Coronal, Spinous
Which cuticle type is human? Which is animal? Imbricate - Human Coronal - Animal Spinous - Animal
Thickest layer, contains most pigment cortex
Outer layer of hair cuticle
Center of hair medulla
What are the medulla patterns? Continuous, interrupted, fragmented, solid, and none
How do you calculate medullary index? width of medulla / width of cortex (entire hair)
3 stages of hair development Anagen (hair actively growing, 100 days) Catagen (stops growing, follicles recede, change or turn gray) Telogen (hair becomes dormant, hairs are easily lost)
What medullary index is animal? What is human? .50 or more - Animal .33 or less - Human
3 ways animal hair is different than human hair 1. Animals are spinous/coronal, humans are imbricate cuticles 2. Animals can have banded patterns, humans can't 3. Animal hair is denser toward the medulla, human hair is denser toward the cuticle
What is the function of the cuticle? Protect, hydrate, seal in moisture
What is the function of the cortex? strength, color, texture
What is the function of the medulla? provite elasticity, center, has 5 different patterns
What protein gives hair it's strength? Keratin
How many hairs are typically collected from a suspect? 50-100
Functions of hair Regulates body temperature, decrease friction, protects against sunlight, sense organ for some animals
Different types of hair from human body Head, body, underarm, public, eyebrows, lashes, facial
What features are used for microscopic comparison? Color, length, medulla, diameter
Why is the hair follicle important? Contains the nuclear DNA, so can provide individual evidence
Where are nuclear and mitochondrial DNA found? mtDNA - hair shaft nuclear DNA - follicle
Calculate the magnification of hair under a microscope 10 (eyepiece) x (objective) 10, 40, 100
Created by: elladunmire
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards