Forensic Hair and Fibers

innermost layer of the hair which form a shaft through the middle of hairs.

• Cortex

• Medulla

• Cuticle

twisting of the hair shaft

• Knotting

• Casting

• Buckling

fibrous structural protein which is the hair’s main structural component.

• Keratin

• Medulla

• Cortex

Which layer of hair is the most important component when determining which individual human the hair came from?

• medulla

• cortex

• cuticle

Where is Nuclear DNA found in the hair?

• root

•  hair shaft

• tip

• medulla

When collecting hair as evidence, a detective should NOT do which of the following?

• Pluck
  hairs from the suspect’s head

• Cut
  hairs from the suspect’s head

• Collect
  loose hairs from the suspect’s head

• A
  detective should do all of the above

True or false? The hair below most likely comes from a human

• true

• false

Hair is this type of evidence

• circumstantial

• trace

• class

• all of these

What is the cortex of the hair shaft?

• middle and thickest layer of the hair shaft that contains medulla

• period of hair growth lasting 3 weeks

• irregularly shaped hair shafts

When fibers are transferred directly from victim to suspect or suspect to victim, this is called:

• necessary transfer.

• absolute transfer.

• direct transfer.

• None of these choices.