Hair Analysis - Forensics

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

• True

• False

Secondary transfer is particularly common with animal hair.

• False

• True

Forensic hair analysis first appeared in forensic science text in 1800's

• True

• False

Human hair is made of _________.

• malanin

• keratin

• blood

• nerves

In humans, the cortex is the smallest part of the hair shaft.

• True

• False

If hair is firmly attached to clothing, crime scene investigators should remove it carefully before packaging it.

• True

• False

If hair found at a crime scene is not firmly attached to clothing, the first step to collecting it is to _____.

• package it with the clothing

• dry it and the clothing

• photograph it in situ

• remove it with forceps

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.

Innermost layer of a hair shaft is called the _____________.

• cuticle

• cortex

• follicle

• medulla

Pigment of human hair is __________.

• distributed evenly

• formed in the cuticle

• found in melanin granules

• mostly limited to the medulla

Tags

NGSS.HS-LS3-2