Hair and Fibers Test

Which of the following is NOT one of the hair shapes in cross-section?

• Square

• Round

• Oval

• Flat

Which of the following fibers is of animal origin?

• Cotton

• Silk

• Nylon

• Rayon

Early collection of fibers in an investigation is critical. Within 24 hours, an estimated:

• 75% of all fibers may have fallen and been lost from a crime scene.

• 95% of all fibers may have fallen and been lost from a crime scene.

• 85% of all fibers may have fallen and been lost from a crime scene.

• None of these choices

Which scale pattern identifies human hair?

• A. Imbricate

• B. Coronal

• C. Spinous

• D. None of These

Which statement best describes the significance of a follicular tag in forensic investigations?

• It contains DNA, which can be used for individual identification.

• It is part of the cuticle and used to identify the scale pattern.

• It provides the pigment granules that determine hair color.

• It is the outermost layer of the hair and helps determine hair strength.

Tags

NGSS.MS-LS3-1

What distinguishes natural fibers from synthetic fibers under a microscope?

• Natural fibers are uniform in appearance, while synthetic fibers are irregular.

• Synthetic fibers often have a smooth, regular shape, while natural fibers are more irregular.

• Natural fibers are brightly colored, while synthetic fibers are always dull.

• Synthetic fibers have cuticles like hair, while natural fibers do not.

What is class evidence?

• A. Evidence that can isolate or exclude a or group of people as a suspect.

• B. A video recording or witness testimony

• C. Evidence that is unique and can only be traced to one person.

• D. evidence that comes from living things

When observing a cat hair image under the microscope, it is possible to contrast it to a human hair by observing the —

• A. DNA

• B. distribution of pigment

• C. medullary pattern

• D. presence of keratin

Tags

NGSS.MS-LS4-2

A male was found deceased early one morning. After further analysis of the decedent’s body, a hair was found on his shirt. The medulla portion of the hair was large and patterned. What source did the hair come from?

• Animal

• Human

• Neither

• Not enough information provided

Tags

NGSS.MS-LS4-2

A hair sample was analyzed under a microscope and found to have a triangular cross section. Which region of the body was the hair from?

• Beard

• Eyelash

• Pubic

• Scalp