Hair Evidence Review

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

• Medulla

• Cuticle

• Cortex

• Shaft

The main purpose of hair is to:

• Protect against sunlight

• Aid in sensory

• Regulate body temperature

Tags

NGSS.MS-LS1-8

When being compared to a wooden pencil, which part of hair represents the lead?

• medulla

• cortex

• cuticle

• follicular tag

We know hair is from a human if the Medullary Index (MI) …

• The medullary index is 0.5 or greater

• The medullary index is 0.33 or less

• The cuticle is coronal

• The medulla is fragmented

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 (break down)

The hair shaft is composed of what important protein?

• Cellulose

• Chitin

• Peptidoglycan

• Keratin

Hair is what type of evidence without the follicle?

• Class

• Individual

• unknown

• all of the above

DNA is NEVER present on hair

• False

• True

Is it possible to determine what body part hair evidence came from?

• Yes

• No

Is it possible to determine the species (whether its animal or human) of hair evidence without DNA?

• Yes

• No