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33 Cards in this Set
- Front
- Back
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A Positive Woods lamp identifies the presence of semen. |
False |
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A Urine sample can be collected to examine for the presence of semen |
False |
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Esplalin how you would collect, package and store a bloody knife possibly used in a murder |
Air Dry, Boxed up, stored at room temp |
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A DNA reference should be collected in a_______stopper tube |
Purple |
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what is "touch" DNA? What precautions should be taken for these types of samples? |
Touch DNA is an item of evidence that the suspect touched. precautions: gloves, mask, and limited amount of handlers |
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what kind of evidence can be found on a condom? |
pubic hair roots, condom wrapper for prints, vaginal cells, blood, saliva |
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name some factors that can degrade DNA |
Moisture, humidity, heat, dirt, grease, UV light cleaning agents: bleach |
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what is a substrate control? |
apparently unstained area near the stained area. |
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which of the following is NOT a preliminary test for blood? a. Luminol b. Benzidine c. Hemastix d. Leucomalachite green e. They are all preliminary tests for blood |
They are all preliminary tests for blood |
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name the preliminary test for semen |
Acid Phosphatase |
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What is the differential extraction |
separates sperm cell DNA from non sperm cell DNA |
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High levels of _______ indicates the presence of saliva |
Amylase |
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what does PCR stand for? Explain PCR. explain the benefits of using PCR in forensic casework |
Puliminarus Chain Reaction, amplification of DNA sequences Benifits: 1. good for small samples. 2. degraded evidence. 3. discriminating power (abo v dna) |
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what information foes to CODIS |
DNA profiles of offenders, a DNA profiles of solved and unsolved cases |
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mitochondrial DNA is passed from your father. |
FALSE |
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Y chromosomes are paternally inherited |
True |
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name what precautions can be taken to avoid contamination at a crime scene. |
Gloves, mask, limited people on scene. change gloves constantly. |
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what does DSLR stand for |
Digital single lends refelx |
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name some advantages for using digital vs. film photography |
digital: cost saving. no chem. more storage |
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name the four camera modes |
manual, aperture, shutter priority, program |
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define depth of field |
the area in a photo in which objects are in sharp focus |
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what is metadata? what kind of info do you have with metadata/ where is this info stored |
info about the image: date time location camera mode camera setting. stored in image file |
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what are the three types of photographs that should be taken at a crime scene? |
overall, midrange, close up (with/without ruler) |
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what is latent print |
not visible |
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what is visible/ patent print. give example |
not visible Ex: bloody finger print |
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what is a plastic print |
a fingerprint thats in molding material (ex. clay) |
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what is a finger print made of? E.A.S.Y |
Eccrine Apocrine Sebaceoos Yuk |
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What does ACE-V stand for? what is it? |
Analysis comparison, evaluation, varification |
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beside using black powder what chemical is commonly used to enhance latent prints on nonporous material? |
super glue |
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what chemical is commonly used to process evidence on porous material? |
ninhydrin |
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what precautions should be taken when processing latent evIdence which may have "touch" DNA |
gloves, mask, limit people, don't use same brush |
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how should latent print evidence be stored/ |
room temp |
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name the three common fingerprint patters |
loop, arch, whorl |
