Forensic science name Hair Worksheet



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FORENSIC SCIENCE Name _________________________________
Hair Worksheet

Trace Evidence I (Hairs and Fibers) Date _______________________ Per _______




  1. What is trace evidence?


  1. Is it possible to individualize a human hair to any single head based on its morphology? Explain.



  1. Does hair have any value as physical evidence? Explain.


  1. Hair is an __________________ of the skin that grows out of an _______________ known as the ______________ _______________.




  1. The length of a hair extends from its _______________ or ________________ embedded in the ______________, continues into the _______________, and terminates at the ________.




  1. The scale structure covering the exterior of the hair is known as the _____________.




  1. The main body of the hair shaft is known as the ______________. This is actually made up of spindle-shaped ______________ cells that are aligned in a regular array _________________ to the length of the hair.




  1. What is the cortex’s major forensic importance?


  1. A cellular column running through the center of the hair is known as the _________________.




  1. What is the medullary index?


  1. How does the medullary index differ from animal vs. human hair?


  1. Explain the three or four different medulla patterns. Draw them.



  1. What is the main function of the root?


  1. What are the three phases of hair growth?



  1. What is a follicular tag?




  1. What is the significance of the case study “The Central Park Jogger Case Revisited”? What part did hair analysis play in this case? What part did DNA play in this case?




  1. Can the body area from which a hair originated be determined? Explain.


  1. Can the racial origin of hair be determined? Explain.


  1. Can the age and sex of an individual be determined from a hair sample? Explain.


  1. Is it possible to determine if hair was forcibly removed from the body?


  1. What efforts are being made to individualize human hair? Explain.


  1. What is the difference between nuclear DNA and mitochondrial DNA? Explain location of each and inheritance of each.




  1. How long should a shaft be to get an extremely high success rate for obtaining mitochondrial DNA that can be used in an investigation?


  1. Explain the collection of hair evidence. What should always accompany a sample?



  1. What is a representative sampling of head hair?


  1. What is a representative sampling of pubic hair?


  1. How should a sample be removed?


  1. How did hair analysis play in the conviction of the murder of Ennis Cosby?



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