Hair and Fiber Quiz

What is the primary role of hair as physical evidence in crime investigations?

• To identify the exact individual

• To provide corroborative evidence

• To determine the age of the individual

• To measure the length of the hair

What are the three layers of the hair shaft?

• Cuticle, cortex, and follicle

• Cuticle, cortex, and medulla

• Cortex, medulla, and root

• Follicle, shaft, and tip

What does the medullary index measure?

• The length of the hair

• The diameter of the medulla relative to the diameter of the hair shaft

• The color of the hair

• The thickness of the cuticle

How does the medulla vary among different species?

• It is always continuous

• It varies in shape and presence

• It is absent in all species

• It is always fragmented

What tool is indispensable for comparing the morphological characteristics of hair?

• DNA sequencer

• Comparison microscope

• Electron microscope

• Spectrometer

What features are particularly important in animal hair identification?

• Color and length

• Scale structure, medullary index, and medullary shape

• Diameter and texture

• Pigment granules

What is a common request when comparing hair strands at a crime scene?

• Determining the age of the individual

• Determining the body area from which hair originated

• Determining whether hair was forcibly removed

• Determining if hair matches the suspect's

What is the role of a medulla in hair comparison?

• Determines the color of the hair

• Indicates the presence or absence of a central core

• Affects the length of the hair

• Influences the texture of the hair

What type of DNA can be extracted from the hair shaft?

• Nuclear DNA

• Mitochondrial DNA

• Chromosomal DNA

• Ribosomal DNA

What is the source of mitochondrial DNA?

• Both parents

• Only the father

• Only the mother

• Neither parent