FSC100: The Real CSI Final Exam FINAL QUESTIONS
WITH CORRECT ANSWERS SOLVED .
a more correct term for 'copies' would be... - CORRECT ANSWER✅✅alleles
a more correct term for 'site' would be... - CORRECT ANSWER✅✅locus
accuracy of population frequencies - - CORRECT ANSWER✅✅- previous assumptions of frequencies in
populations may be wrong - STRs may not be independent
- see certain alleles more often if there's a high number of related individuals
- mistakes can be made when samples are coded into database
all the males in a lineage will have the same what? - CORRECT ANSWER✅✅Y-STR profile
analysis - - CORRECT ANSWER✅✅-suitability of print, clarity of print
- level 1, 2, 3 details needed
- sufficient quality and quantity for comparison will depend on examiner
based on the event that caused them, bloodstain patterns can be separated into two main categories: -
CORRECT ANSWER✅✅passive and dynamic
can DNA individualize? - CORRECT ANSWER✅✅no, only fingerprints can
can you develop footwear impressions from snow? - CORRECT ANSWER✅✅yes, it's just difficult
circle/spiral limits - CORRECT ANSWER✅✅difficult to stay in a perfect spiral path to ensure nothing is
missed
,circle/spiral search benefits - CORRECT ANSWER✅✅good for locating additional items associated to an
existing piece of evidence
typically done indoors - too difficult to do outdoors
comparison - - CORRECT ANSWER✅✅- level 1 to level 2 to level 3
- pattern type, ridge flow - does it agree with known?
- minutiae agreement? pore structure agreement?
- exclusions can be made at any step in process
control/known samples include: - CORRECT ANSWER✅✅- standard/reference - ex. hair/blood/DNA
- substrate control - ex. oil, carpet
- elimination samples
DNA samples collected form known individuals... - CORRECT ANSWER✅✅- with consent, by warrant, or
discarded samples
- provide information about potential origins of unknown profile and the comparison profile
- exclude individuals as source of unknown
- unknown profile is uploaded to national DNA databank
do you always have a full DNA profile? - CORRECT ANSWER✅✅no, either because of DNA degradation
or too little DNA was recovered
do you use superglue or ninhydrin to recover a fingerprint from cardboard? - CORRECT
ANSWER✅✅ninhydrin
do you use superglue or ninhydrin to recover a fingerprint from glass? - CORRECT
ANSWER✅✅superglue
do you use superglue or ninhydrin to recover a fingerprint from metal? - CORRECT
ANSWER✅✅superglue
,do you use superglue or ninhydrin to recover a fingerprint from paper? - CORRECT
ANSWER✅✅ninhydrin
do you use superglue or ninhydrin to recover a fingerprint from plastic? - CORRECT
ANSWER✅✅superglue
due to what concept do blood drops that fall distances greater than 7 feet won't produce stains with
increased diameter? - CORRECT ANSWER✅✅terminal velocity
evaluation - - CORRECT ANSWER✅✅- if there are unexplained differences, there's an exclusion of
known as sample
- when every compared feature is consistent, and enough features when considered as a whole leads to
individualization
- no standard for how many characteristics need to match
fingerprint residue - CORRECT ANSWER✅✅- from eccrine glands (watery sweat)
- from touching areas of body containing apocrine glands (sweat with fats and proteins) before touching
an object
- from touching external sources then touching an object
first level of fingerprint detail - CORRECT ANSWER✅✅basic fingerprint patterns
- arch, whorl, loop, deltas
- not sufficient for individual ID
how do bloodstains dry? - CORRECT ANSWER✅✅from perimeter towards centre, as edges dry, they
become more resistant to alteration/removal than the wet interior
how do ESLDs work? - CORRECT ANSWER✅✅opposite charges attract, surface is positively charged and
dust particles are negatively charged; creates more concentrated charge in lifting medium; residual
positive and negative charges keep print in place on film
, how do you calculate coincidental match probability? - CORRECT ANSWER✅✅STR1 X STR2 X STR3 ...
XSTR13
(multiply together all of the information you have)
how do you cast an impression? - CORRECT ANSWER✅✅mix dental stone with water and pour
systematically into impression - don't pour right into impression
how do you collect and preserve firearm evidence? - CORRECT ANSWER✅✅- photograph weapon
before unloading it to transport weapon
- securely place in container with barrel end indicated on outside of box
how do you determine area of origin? - CORRECT ANSWER✅✅stringing, laser scanning, computer
software
how do you document evidence? - CORRECT ANSWER✅✅- case number
- item number
- location
- name of collector
- date and time of discovery
- date and time of collection
- description of item
how do you document footwear impressions? - CORRECT ANSWER✅✅photograph and make casts
how do you document footwear prints? - CORRECT ANSWER✅✅photograph and lift them
how do you ensure standardization with DNA testing? - CORRECT ANSWER✅✅repeats are scored the
same by everyone
WITH CORRECT ANSWERS SOLVED .
a more correct term for 'copies' would be... - CORRECT ANSWER✅✅alleles
a more correct term for 'site' would be... - CORRECT ANSWER✅✅locus
accuracy of population frequencies - - CORRECT ANSWER✅✅- previous assumptions of frequencies in
populations may be wrong - STRs may not be independent
- see certain alleles more often if there's a high number of related individuals
- mistakes can be made when samples are coded into database
all the males in a lineage will have the same what? - CORRECT ANSWER✅✅Y-STR profile
analysis - - CORRECT ANSWER✅✅-suitability of print, clarity of print
- level 1, 2, 3 details needed
- sufficient quality and quantity for comparison will depend on examiner
based on the event that caused them, bloodstain patterns can be separated into two main categories: -
CORRECT ANSWER✅✅passive and dynamic
can DNA individualize? - CORRECT ANSWER✅✅no, only fingerprints can
can you develop footwear impressions from snow? - CORRECT ANSWER✅✅yes, it's just difficult
circle/spiral limits - CORRECT ANSWER✅✅difficult to stay in a perfect spiral path to ensure nothing is
missed
,circle/spiral search benefits - CORRECT ANSWER✅✅good for locating additional items associated to an
existing piece of evidence
typically done indoors - too difficult to do outdoors
comparison - - CORRECT ANSWER✅✅- level 1 to level 2 to level 3
- pattern type, ridge flow - does it agree with known?
- minutiae agreement? pore structure agreement?
- exclusions can be made at any step in process
control/known samples include: - CORRECT ANSWER✅✅- standard/reference - ex. hair/blood/DNA
- substrate control - ex. oil, carpet
- elimination samples
DNA samples collected form known individuals... - CORRECT ANSWER✅✅- with consent, by warrant, or
discarded samples
- provide information about potential origins of unknown profile and the comparison profile
- exclude individuals as source of unknown
- unknown profile is uploaded to national DNA databank
do you always have a full DNA profile? - CORRECT ANSWER✅✅no, either because of DNA degradation
or too little DNA was recovered
do you use superglue or ninhydrin to recover a fingerprint from cardboard? - CORRECT
ANSWER✅✅ninhydrin
do you use superglue or ninhydrin to recover a fingerprint from glass? - CORRECT
ANSWER✅✅superglue
do you use superglue or ninhydrin to recover a fingerprint from metal? - CORRECT
ANSWER✅✅superglue
,do you use superglue or ninhydrin to recover a fingerprint from paper? - CORRECT
ANSWER✅✅ninhydrin
do you use superglue or ninhydrin to recover a fingerprint from plastic? - CORRECT
ANSWER✅✅superglue
due to what concept do blood drops that fall distances greater than 7 feet won't produce stains with
increased diameter? - CORRECT ANSWER✅✅terminal velocity
evaluation - - CORRECT ANSWER✅✅- if there are unexplained differences, there's an exclusion of
known as sample
- when every compared feature is consistent, and enough features when considered as a whole leads to
individualization
- no standard for how many characteristics need to match
fingerprint residue - CORRECT ANSWER✅✅- from eccrine glands (watery sweat)
- from touching areas of body containing apocrine glands (sweat with fats and proteins) before touching
an object
- from touching external sources then touching an object
first level of fingerprint detail - CORRECT ANSWER✅✅basic fingerprint patterns
- arch, whorl, loop, deltas
- not sufficient for individual ID
how do bloodstains dry? - CORRECT ANSWER✅✅from perimeter towards centre, as edges dry, they
become more resistant to alteration/removal than the wet interior
how do ESLDs work? - CORRECT ANSWER✅✅opposite charges attract, surface is positively charged and
dust particles are negatively charged; creates more concentrated charge in lifting medium; residual
positive and negative charges keep print in place on film
, how do you calculate coincidental match probability? - CORRECT ANSWER✅✅STR1 X STR2 X STR3 ...
XSTR13
(multiply together all of the information you have)
how do you cast an impression? - CORRECT ANSWER✅✅mix dental stone with water and pour
systematically into impression - don't pour right into impression
how do you collect and preserve firearm evidence? - CORRECT ANSWER✅✅- photograph weapon
before unloading it to transport weapon
- securely place in container with barrel end indicated on outside of box
how do you determine area of origin? - CORRECT ANSWER✅✅stringing, laser scanning, computer
software
how do you document evidence? - CORRECT ANSWER✅✅- case number
- item number
- location
- name of collector
- date and time of discovery
- date and time of collection
- description of item
how do you document footwear impressions? - CORRECT ANSWER✅✅photograph and make casts
how do you document footwear prints? - CORRECT ANSWER✅✅photograph and lift them
how do you ensure standardization with DNA testing? - CORRECT ANSWER✅✅repeats are scored the
same by everyone
