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60 Cards in this Set
- Front
- Back
An automated technique for color-coding and separating, replicating and analyzing repeating sequences within DNA is called...
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Short Tandem Repeat (STR)
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What is the chromosome designation for the male sex?
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XY |
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What type of cell does not contain nuclear DNA
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Red blood cells
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DNA is used in forensic cases for....
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1 |
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Y-STR testing is useful in forensic DNA analysis for...
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determining what male contributed to a mixed sample
distinguishing male and female DNA in rape cases |
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Which of the following surfaces will cause a blood drop to rupture and create satellite spatter?
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Wood
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____________ blood pattern is produced when blood drops leave via centrifugal force from an object that has accumlated blood on its surface.
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Cast-off
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To determine the angle of impact of a blood drop, an analyst ...
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Takes the width of the drop and divides it by the length of the drop (not including the tail) and then takes the inverse sine of the ratio
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Drug testing for employment is only for federal and state employees as most corporations do not want to spend the time or money to do workplace drug testing
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False
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In drug level testing for workplaces, the federal government established levels for each drug at above zero to allow for the fact that all people use drugs and that only those who abuse them should be punished.
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False
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Which of the following are most useful and are most commonly done in workplace drug testing (select all that apply)
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hair
urine |
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Confirmatory tests are tests to....
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are proof positive that an unknown substance is actually the substance it was believed to be
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Which blood type is the universal donor?
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O
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Time since intercourse and location where deposited have a great deal of impact on whether or not semen can be detected
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True
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Phadebas Reagent Paper tests for which of the following substances?
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Saliva
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Brentamine Fast Blue is used for ....
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presumptive test for seminal acid phosphatase
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PCR was important to forensic DNA testing as it allowed for very small amount of DNA to be replicated fairly quickly.Selected Answer:True
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True
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What possible sources for comparative DNA do police in the US commonly use
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CODIS
Search warrants Abandoned DNA |
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A small section of repeating DNA (2-7 base pairs long) is known as a....
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1 |
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Chemical stimulants such as mesculine and cocaine have what kinds of impact on body systems?
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increased heart rate and blood pressure
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Viterous humor is...
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the fluid from the eye
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Forward spatter is produced by a gunshot exit wound
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True |
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Blood pattern analysis is helpful for...
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1. Corroboration of statements 2. Apprehension of suspects 3. Reconstruction of past events 4. Exoneration of the accused |
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How is directionality determined in blood spatter?
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the narrowed end of an elongated blood drop will point in the direction of travel
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To determine a DNA match between an unknown sample and a known sample, the analyst merely needs to compare the peaks on the analysis output. If they are all in the same place and of the same amplitude (height) is it considered rare enough to be a match
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False |
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What biological items are used as class characteristics for identification?
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ABO blood groups, RH factor secretor status, enzyme markers |
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Single drops of blood that collect around a parent stain as a result of hitting a rough target surface are called....
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satellite spatter
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When a partially dried bloodstain is altered by contact or wiping it is called a/an....
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skeletonized pattern
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most useful in workplace drug testing for determining long term abuse of drugs?
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Hair
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Which blood type is the universal recipient?
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AB
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Kastle-Mayer test
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Swabbed sample changes to pink to show potential for blood being present
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Luminol test
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Emits a blue-white to yellow light in a darkened room to show potential for blood being present
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Hexagon OBTI
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Test strip produces lines to determine if human blood is present
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Takayama test
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Prepared microscope sample forms crystals to confirm the presence of blood
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Which blood type is the universal donor?
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O |
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AB
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Has A and B antigens and makes no antibodies
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O
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Has no antigens and produces Anti-A and Anti-B antibodies
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A
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Has only A antigens and produces Anti-B antibodies
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B
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Has only B antigens and produced Anti-A antibodies
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All expirated blood will show evidence of air bubbles mixing with the blood drops.
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False
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most likely to cause a mist-like dispersion of blood drops less than 1 mm in diameter?
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gunshot
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Blood drops in the shape of a ball but as it reaches terminal velocity it becomes teardrop shaped.
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False
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An automated technique for color-coding and separating, replicating and analyzing repeating sequences within DNA is called..
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1 |
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Each child inherits more chromosomes from their mother than their father because the mother provides the egg, while the father only gives sperm.
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False
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How many chromosomes does a normal person have?
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23 pairs
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What biological items are used as class characteristics for identification?
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1 |
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A small section of repeating DNA (2-7 base pairs long) is known as a....
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Microsatellite Short Tandem Repeat (STR) |
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A non-secretor is someone who secretes their Rhesus factor in their body fluids.
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False
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Any degredation of forensic evidence samples is due to poor collection and preservation.
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False
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A nucleotide is..
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a structure on DNA which codes for the production of specific proteins in our body
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Forensic phenotyping uses genetic information within your DNA to make possible determinations for how you would look
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True |
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What does PSA stand for? |
Prostate Specific Antigen (confirmatory test for seminal fluid) |
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How long can SAP be detected? |
72 hours |
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Presumptive Test for Sperm |
Brentamine Fast-Blue |
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Presumptive test for blood? |
1. Luminol (light test. sprayed reagent reacts with blood) 2. Adler Test (a stain is swabbed, placed on a spot plate and combined with reagent) |
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Confirmatory test for blood? |
1. Takyama Test or Teichman Test (when heated, blood will form crystals) |
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Presumptive Test for human blood? |
Hexagon OBTI (works like a pregnancy test) |
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Confirmatory test for human blood? |
Ouchterlony (gel with blood droplets) or Hematrace (works like a pregnancy test) |
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Individualizing characteristics for DNA? |
mini-satellites (VNTRs) and microsatellites (STRs) |
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Larger sections of repeating DNA? |
Minisattelites (9-80 base pairs) Variable Number of Tandem Repeats (VNTRs) |