Forensics Hair and Fibers

To determine the medullary index, you would ______.

• measure the diameter of the medulla and divide it by the diameter of the hair

• measure the diameter of the hair and add it to the diameter of the medulla

• measure the length of the medulla and divide it by the length of the hair

• measure the diameter of the medulla and multiply it by the diameter of the cortex

Hair is composed of a protein called...

• keratin

• medulla

• casein

• cellulose

Tags

NGSS.HS-LS1-1

melanin granules

• the central core of a hair fiber

• the tough outer covering of a hair composed of overlapping scales

• bits of pigment found in the cortex of a hair

• the actively growing root or base of hair containing DNA and living cells

Tags

NGSS.MS-LS1-5

comparison microscope

• the central core of a hair fiber

• material that connects an individual or thing to a certain group

• the tough outer covering of a hair composed of overlapping scales

• a compound microscope that allows the side by side comparison of the samples, such as of hair or fibers

class evidence

• material that connects an individual or thing to a certain group

• bits of pigment found in the cortex of a hair

• the tough outer covering of a hair composed of overlapping scales

• small but measurable amounts of physical or biological material found at crime scene

keratin

• a type of fibrous protein that makes up the majority of the cortex of a hair

• bits of pigment found in the cortex of a hair

• the actively growing root or base of hair containing DNA and living cells

• the region of hair located outside of the medulla containing granules of pigments

Which elements are in the unknown sample?

• A and B

• B and C

• A and D

• B and D

Tags

NGSS.HS-PS1-1

Found in small but measurable amounts. 

• Physical evidence

• Testimonial evidence

• Rare evidence

• Trace evidence

The idea that with any contact between two items there will be transfer is known as _____

• physical evdience

• Locard's exchange principle

• Forensic exchange principle

• the law of forensics

What is the primary protein found in human hair that forensic scientists analyze?

• Keratin

• Collagen

• Elastin

• Myosin