Hair Analysis -- Forensic Science

Today, microscopic hair analysis alone is considered sufficient evidence for conviction.

• True

• False

Human hair is made of _________.

• malanin

• keratin

• blood

• nerves

Innermost layer of a hair shaft is called the _____________.

• cuticle

• cortex

• follicle

• medulla

The medullary index is __________.

• is proportionally much thicker in nonhumans

• is the sum of the diameter and the hair length

• cannot be differentiated between humans and animals

• ranges from 0.33 to 0.5 for all human or animal hair.

Pigment of human hair is __________.

• distributed evenly

• formed in the cuticle

• found in melanin granules

• mostly limited to the medulla

Tags

NGSS.MS-LS3-1

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

• Medulla

• Cuticle

• Cortex

• Shaft

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

The tough clear outside covering of a hair shaft is

• cuticle

• cortex

• medulla

• polymer

The middle layer of a hair shaft that contains pigment

• the cortex
• the medulla
• the cuticle
• the polymer

What type of evidence is hair without the follicle considered?

• Individual
• Class