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Questions and Answers
The shaft of the hair is considered class evidence in a trial.
The shaft of the hair is considered class evidence in a trial.
True (A)
Hair is composed of a protein called cellulose.
Hair is composed of a protein called cellulose.
False (B)
All hairs on the head of a person are identical.
All hairs on the head of a person are identical.
False (B)
The cortex may contain pigment granules.
The cortex may contain pigment granules.
The hair shaft is composed of the cuticle, cortex, and ___.
The hair shaft is composed of the cuticle, cortex, and ___.
Which factors are used to calculate the medullary index of the hair?
Which factors are used to calculate the medullary index of the hair?
Which of the following characteristics is found in typical Asian hair?
Which of the following characteristics is found in typical Asian hair?
Human hair has which type(s) of cuticle?
Human hair has which type(s) of cuticle?
Neutron activation analysis can check hair for the presence of...
Neutron activation analysis can check hair for the presence of...
Which part(s) of a hair can be analyzed for DNA?
Which part(s) of a hair can be analyzed for DNA?
The cuticle scales of the hair always point toward the...
The cuticle scales of the hair always point toward the...
The period of active hair growth is called the ___ stage.
The period of active hair growth is called the ___ stage.
Although variations can occur, which of the following best describes northern European hair?
Although variations can occur, which of the following best describes northern European hair?
Which of the following is most likely a result of hair bleaching?
Which of the following is most likely a result of hair bleaching?
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.
