Forensic Science Hair Evidence

The central core of the hair is called the...?

• Medulla
• Cuticle
• Cortex
• Shaft

cortex

• the region of hair located outside of the medulla containing granules of pigments
• material that connects an indivisual or thing to a certain group
• a type of fibrous protein that makes up the majority of the cortex of a hair
• the tough outer covering of a hair composed of overlapping scales

Is this hair from an animal or human?

• Human

• Animal

Using the pencil analogy, which structure corresponds to the wood?

• Follicle
• Cortex
• Cuticle
• Medulla

Hair is helpful in solving old crimes because…

• hair on a suspect never changes
• hair always contains DNA evidence
• hair takes little room to store in evidence closets
• hair does not easily decompose

What kind of medulla is this?

• Fragmented
• Continuous
• Interrupted/Intermittent
• There is no medulla - Absent

comparison microscope

• a compound microscope that allows the side by side comparison of the samples, such as of hair or fibers
• material that connects an indivisual or thing to a certain group
• the tough outer covering of a hair composed of overlapping scales
• the centrel core of a hair fiber

Hair analysis may be used to determine all of the following except:

• manner in which the hair was removed
• body region from which the hair came from
• broad racial background of the individual from which the hair came from
• identity of the individual from which the hair came from (without the follicle)

trace evidence

• small but measurable amounts of physical or biological material found at crime scene
• the tough outer covering of a hair composed of overlapping scales
• the centrel core of a hair fiber
• the actively growing root or base of hair containing DNA and living cells

neutron activation analysis

• a method of analysis that determines composition of elements In a sample

• the tough outer covering of a hair composed of overlapping scales
• the centrel core of a hair fiber
• small but measurable amounts of physical or biological material found at crime scene