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Quiz 2

Criminalistics

QuestionAnswer
What are the two sources of DNA in the cell? Nucleus & Mitochondria
What is the name of the forensics DNA database? CODIS
What are Y-STRs? Short tandem repeats located on the Y chromosome
How are Y-STRs inherited? Paternally
What is one item you would collect skin cells from and how? A worn item such as a sweater, use the scrape and swab method (scrape with sterile scalpel and swab with moistened swab)
Why should a body be photographed before it is moved? When a body is moved, blood will transfer or where the blood is pooling in the body may change
What are three items that may be collected at an autopsy? Clothing, fingernail clippings, blood samples
Name and define one cause of death Blunt force injury - caused by a non sharpened object
Name and define one manner of death Accidental - no intent to cause harm through negligence
Name and define one factor in determining time of death Rigor mortis - after death the muscles stiffen in 24-36 hours, body freezes in the position it was in at the time of death
What is one type of analysis including firearms at the lab? Distance determination
What is one type of hand gun? Pistol
What is one type of long gun? Shotgun
What types of firearms do not eject casings? Revolver
Define lands The raised portion between the grooves in a rifled barrel
Define grooves The cut portion because the lands in a rifled barrel
Name the 3 components in a round of ammo Primer, casing, and explosive
How do we collect gunshot residue? GSR stubs
What tests show which color when positive? DTO tests for copper, a dark grey/green color is positive SoRho tests for lead, a purple color change is positive
Where is ammo stored in a firearm? Magazine
What type what of characteristics are used in looking at tool marks, class, or individual? Shape and size of the tool
Created by: astringer2401
 

 



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