FIS Exam 3 questions with 100%
complete solutions already passed
When do basic patterns of friction ridge skin form? - correct answer ✔✔The volar pads form at
about 4 months gestation, which is the second trimester of fetal development.
What is the general term for the set of particular features found in friction ridge patterns? -
correct answer ✔✔Minutiae
Who was the first credited European to recognize the value of fingerprints as a means of
personal identification? - correct answer ✔✔Herschel
How do fingerprint powders work? - correct answer ✔✔Adherence to the fatty components in
fingerprint residue
Chemicals like cyanoacrylate react with - correct answer ✔✔the fatty lipids in a print
Materials like ninhydrin react with - correct answer ✔✔the amino acids in a print
Ninhydrin is specifically used on __________ substrates, which absorb the fingerprint
components. - correct answer ✔✔porous
Which fingerprint pattern lacks a definite core? - correct answer ✔✔arch
(Cores are formed when friction ridges make abrupt changes in direction at the center of a
pattern. Since the ridges in arches don't change direction, they don't form a core.)
,Small Particle Reagent should be used on prints that are: - correct answer ✔✔Are or have been
wet
SPRs- like powders on steroids: adhere very firmly to even smallest remnant of lipid. When
fingerprints have been wet, sweat and protein portion more easily washed away than lipids.
more expensive than plain fingerprint powder.
What does physical developer react with in fingerprint residue? - correct answer ✔✔lipid and
other water-insoluble components.
Fingerprint patterns can change during a lifetime only there is damage to the dermal skin layer.
T or F - correct answer ✔✔True- dermis is the living layer or skin producing the patterns
We can tell that an individual's genetic make-up dictates fingerprint pattern development
because identical twins from the same fertilized egg also have identical fingerprints. T or F -
correct answer ✔✔False- It is probable that genetics plays a role in dictating fingerprint
patterns, since the basic pattern distribution tends to be the same within families but twins
would have similar, not identical prints
The automated fingerprint identification system (AFIS) only contains known prints. T or F -
correct answer ✔✔False- huge array of prints from known sources (criminals, voluntary
submissions for background checks) + giant number of fingerprints from crime scenes that r not
yet associated with particular identity.
Approximately what percentage of latent prints yield an identification when using AFIS? -
correct answer ✔✔15%
Fingerprints developed in situ may be lifted prior to being photographed. - correct answer
✔✔false
Even though the computer systems have no cognitive biases, a human examiner makes the
actual identification when dealing with fingerprints. - correct answer ✔✔true
, Ending Ridge - correct answer ✔✔ridge ends abruptly
Bifurcation - correct answer ✔✔ridge splits into two ridges
Dot - correct answer ✔✔ridge is short in length
Island - correct answer ✔✔two bifurcations facing each other
Patent - correct answer ✔✔fingerprint that needs no enhancement to be clearly recognized as a
fingerprint
Latent - correct answer ✔✔fingerprint that requires additional processing to be made visible
and suitable for comparison
The proper chemical name for super glue used in fingerprint development is _________? -
correct answer ✔✔Cyanoacrylate
the locations where friction ridges are found on humans - correct answer ✔✔Soles of feet
Toes
Palms
Fingertips
Which of the following methods would be appropriate for developing fingerprints on a piece of
clear packing tape? - correct answer ✔✔gentian violet; however, sticky side powder is also
appropriate
complete solutions already passed
When do basic patterns of friction ridge skin form? - correct answer ✔✔The volar pads form at
about 4 months gestation, which is the second trimester of fetal development.
What is the general term for the set of particular features found in friction ridge patterns? -
correct answer ✔✔Minutiae
Who was the first credited European to recognize the value of fingerprints as a means of
personal identification? - correct answer ✔✔Herschel
How do fingerprint powders work? - correct answer ✔✔Adherence to the fatty components in
fingerprint residue
Chemicals like cyanoacrylate react with - correct answer ✔✔the fatty lipids in a print
Materials like ninhydrin react with - correct answer ✔✔the amino acids in a print
Ninhydrin is specifically used on __________ substrates, which absorb the fingerprint
components. - correct answer ✔✔porous
Which fingerprint pattern lacks a definite core? - correct answer ✔✔arch
(Cores are formed when friction ridges make abrupt changes in direction at the center of a
pattern. Since the ridges in arches don't change direction, they don't form a core.)
,Small Particle Reagent should be used on prints that are: - correct answer ✔✔Are or have been
wet
SPRs- like powders on steroids: adhere very firmly to even smallest remnant of lipid. When
fingerprints have been wet, sweat and protein portion more easily washed away than lipids.
more expensive than plain fingerprint powder.
What does physical developer react with in fingerprint residue? - correct answer ✔✔lipid and
other water-insoluble components.
Fingerprint patterns can change during a lifetime only there is damage to the dermal skin layer.
T or F - correct answer ✔✔True- dermis is the living layer or skin producing the patterns
We can tell that an individual's genetic make-up dictates fingerprint pattern development
because identical twins from the same fertilized egg also have identical fingerprints. T or F -
correct answer ✔✔False- It is probable that genetics plays a role in dictating fingerprint
patterns, since the basic pattern distribution tends to be the same within families but twins
would have similar, not identical prints
The automated fingerprint identification system (AFIS) only contains known prints. T or F -
correct answer ✔✔False- huge array of prints from known sources (criminals, voluntary
submissions for background checks) + giant number of fingerprints from crime scenes that r not
yet associated with particular identity.
Approximately what percentage of latent prints yield an identification when using AFIS? -
correct answer ✔✔15%
Fingerprints developed in situ may be lifted prior to being photographed. - correct answer
✔✔false
Even though the computer systems have no cognitive biases, a human examiner makes the
actual identification when dealing with fingerprints. - correct answer ✔✔true
, Ending Ridge - correct answer ✔✔ridge ends abruptly
Bifurcation - correct answer ✔✔ridge splits into two ridges
Dot - correct answer ✔✔ridge is short in length
Island - correct answer ✔✔two bifurcations facing each other
Patent - correct answer ✔✔fingerprint that needs no enhancement to be clearly recognized as a
fingerprint
Latent - correct answer ✔✔fingerprint that requires additional processing to be made visible
and suitable for comparison
The proper chemical name for super glue used in fingerprint development is _________? -
correct answer ✔✔Cyanoacrylate
the locations where friction ridges are found on humans - correct answer ✔✔Soles of feet
Toes
Palms
Fingertips
Which of the following methods would be appropriate for developing fingerprints on a piece of
clear packing tape? - correct answer ✔✔gentian violet; however, sticky side powder is also
appropriate
