Hair and Fiber Evidence Test

Animal and human hair have several differences including

• The width of the medulla

• The cuticle pattern

• Both of these

• Neither of these

The region of hair just outside the medulla that contains pigment granules that give hair its color is called

• Cuticle

• Cortex

• Follicle

• Corona

A strand of hair collected as evidence has a healthy follicle attached (indicating active growth) and was most likely pulled out of the head. This hair would be in which stage of its life cycle?

• anagen

• catagen

• telogen

How is hair collected and observed at a crime scene?

• it is vacuumed up, then placed in a bindle

• it is picked up using forceps and then placed in a bindle

• it is picked up with an adhesive and then placed in a bindle

• It can be collected in any of the above manenrs

A hair with a follicle attached can be categorized as what type of evidence?

• Class, Biological, Trace

• Individual, Physical, Trace

• Class, Direct, Trace

• Individual, Direct, Trace

Which of these cuticle patterns is common in human hair? Choose all that apply.

• 
• 
• 
• 

Which part of the hair is the arrow pointing to in this image?

• Cortex

• Cuticle

• Medulla

• Follicle

10. A woman with long, black hair is a suspect in a burglary case at her place of employment. At the crime scene, several long, black hairs (follicles attached) were found attached to the safe that was broken into. The police obtain a warrant and request a sample of 25 hairs from this woman. They tell the woman it is important that they pull the hairs from her head rather than cut the hairs. Suppose the hairs of the woman match the hairs found at the crime scene. Why does this evidence alone not necessarily prove that she was the guilty party?

• The hairs could belong to someone else with similar hair.

• Hair evidence is not reliable.

• The hairs won't lead to a match of an individual person.

• The presence of hair does not prove guilt, only presence at the scene at some point in time.

Match the following hair sample images with the correct medulla pattern present in each. Put the letter choice corresponding to the correct medulla pattern in the blank next to the image.

• 14

• None

• 13

• Fragmented

• 11

• Solid

• 15

• Continuous

• 12

• Interrupted

Which of the following is the correct order from smallest to largest?

• Yarn, fiber, textile

• Fiber, yarn, textile

• Textile, yarn, fiber

• Textile, fiber, yarn