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Hair and Fiber Analysis

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  • Forcibly removed hair is most likely to provide DNA because they have
    scale patterns
    follicular tissue
    cuticle
    the hair shaft
  • The portion of the hair containing its scales is best characterized by
    the cuticle
    the root
    the follicle
    the cortex
  • Which of the following properties should be examined when comparing 2 fibers
    shape
    diameter
    texture
    color
  • A cast of a hair surface can be made by using...
    clear nail polish
    iodine
    paint
    wax
  • Pigment granules that impart hair with color are found in the...
    cuticle
    medulla
    cortex
  • Hair can be best characterized as originating from an animal by examining
    the hair shaft
    the medulla and cuticle
    the growth pattern
    its scale structure
  • The medullary index of human hair is ______the medullary index for most other animals.
    Less than
    The same as
    Equal to
    Greater than
  • Before the 20th century, all fibers were
    synthtic
    chemically treated
    natural
    derived
  • Determining whether a hair sample originated from male or female, the MOST important factor is:
    the length of the hair
    the results of DNA analysis performed on the root structure
    whether the hair was dyed
    whether the hair is bleached
  • The fiber dissolves in HCl. It is more likely to be:
    nylon
    wool
    cotton
    acetate
  • What are functions of hair
    protection
    regulation of body temperature
    all of the responses
    facilitation of evaporation of perspiration
  • Which of the following is NOT a presumptive test for fibers?
    solvent test
    burn test
    density test
    stain test
  • What does burning wool smell like
    burned hair
    burned paper
  • The medullary index of a hair was calculated to be 0.498. The hair is more likely to be:
    from an animal
    from a human
    from a baby
    from a plant
  • The cortex of hair derives its major forensic importance from the fact that it contains
    pigments
    scales
    dna
    medullae
  • In the collection of fiber evidence, great care should be taken to..
    shake off all garments to be sent for examination
    vacuum each item
    avoid cross-contamination of evidence
    package all items together
  • The central canal running through many hairs is known as the...
    shaft
    root
    medulla
    cortex
  • Can age be determined by hair alone
    no
    yes
  • A fiber's microscopic appearance being ribbon-like in shape with twists at irregular intervals:
    acrylic
    cotton
    nylon
    polyester
  • Which is NOT a synthetic fiber
    Polyester
    Acrylic
    Rayon
    All of them are synthetic
  • Which feature of hair is MOST important in making species identification?
    follicle shape
    bulb size
    scale pattern
    shaft lenghth
  • Medullae may be classified as being..
    continuous
    fragmented
    all of the above
    interrupted or absent
  • Which one is not a layer of the hair shaft?
    cortex
    follicle
    cuticle
    medulla
  • The rate of human hair growth per month is
    2 inches
    1 cm
    1 inch
    1 ml
  • If hair does not have DNA, an expert witness is on best scientific footing when stating that...
    the hair in question comes from a 21-year old
    his examination reveals that the hair is that of a male
    a suspect hair comes from a particular animal species
    the given hair comes from a specific person
  • The most prevalent natural plant fiber is...
    linen
    hemp
    silk
    cotton
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