Questions and Answers
The shaft of the hair is considered class evidence in a trial.
True
Hair is composed of a protein called cellulose.
False
All hairs on the head of a person are identical.
False
The cortex may contain pigment granules.
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The hair shaft is composed of the cuticle, cortex, and ___.
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Which factors are used to calculate the medullary index of the hair?
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Which of the following characteristics is found in typical Asian hair?
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Human hair has which type(s) of cuticle?
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Neutron activation analysis can check hair for the presence of...
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Which part(s) of a hair can be analyzed for DNA?
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The cuticle scales of the hair always point toward the...
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The period of active hair growth is called the ___ stage.
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Although variations can occur, which of the following best describes northern European hair?
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Which of the following is most likely a result of hair bleaching?
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Study Notes
Hair Evidence in Forensics
- The hair shaft serves as class evidence in legal trials, aiding in establishing connections between suspects and crime scenes.
- Hair is composed of keratin, not cellulose, which is a common misconception.
Hair Structure and Composition
- Hairs on a single individual's head are not all identical; they exhibit variations.
- The hair shaft contains three main layers: cuticle, cortex, and medulla.
- The cortex layer may include pigment granules, influencing hair color.
Medullary Index
- The medullary index is determined by the relationship between the width of the medulla and the width of the hair shaft.
Hair Characteristics by Ethnicity
- Asian hair commonly has a flattened cross-section.
- Human hair may have pigmented cuticles, which can be analyzed to determine individual characteristics.
Hair Analysis Techniques
- Neutron activation analysis can detect elements like silver in hair.
- DNA analysis can be performed on the hair root, which contains genetic material.
Cuticle Structure
- Cuticle scales directed toward the hair tip are significant when analyzing the hair's structure.
Hair Growth Phases
- The anagen stage denotes the period of active hair growth, which can influence forensic investigations.
Characteristics of Specific Hair Types
- Northern European hair typically appears straight with uniformly distributed granules.
- Hair bleaching often results in a yellowish tint, which can signify chemical treatment.
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Description
Test your knowledge of forensics with this Chapter 3 review flashcard quiz. Covering key concepts about hair analysis, this quiz will help solidify your understanding of class evidence and hair composition. Perfect for students studying forensic science.
