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Forensics Hair
Question | Answer |
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What is trace evidence? | Any very small physical material that can be transferred from person to person or between a person and a crime scene. |
What are some examples of trace evidence? | Hair, fibers, glass, paint, dirt, and plant material. |
Why would you use hair for evidence at a crime scene? | You can figure out if hair is from humans or if it is from animals, hair is small, easily shed, clingy, goes unoticed, is hardy, and survives for a long period of time, and hair contains many toxins like arsenic and you can extract DNA from the follicle. |
What is cortex? | The largest portion of the shaft giving you the hair color that you have. |
What is cuticle? | The layer of cells that cover the surface of the shaft and looks like scales on a fish or even roofing tiles. Scales overlap and always point up the shaft, away from the bulb. |
What is medulla? | Cells that run down the center of the vortex like a canal. |
What is caronal? | Scale of a cuticle, crownlike, and rodents have them. |
What is spinous? | Scale of a cuticle, pedallike, and cats have them. |
What is imbricate? | Scale of a cuticle, flattened, and humans along with other animals have them. |
What is the medullary index of humans and animals? | Humans are 0.3 and animals are greater then 0.5. |