NEW
Font size
WorksheetsBlood evidence and DNA analysis
Total questions: 20
Worksheet time: 20mins
Blood typing is considered:
class evidence
individual evidence
direct evidence
associative evidence
Investigators can individualize blood evidence by:
identifying the DNA from the nucleus of white blood cells
identifying the DNA from the nucleus of red blood cells
identifying the DNA from the nucleus of platelets
identifying the DNA from the nucleus of the serum
An investigator reaches a crime scene and notices droplets of blood. She also notices that there is wounded animal at the scene. Which test would be best to determine if the droplet of blood is human or animal?
Precipitin test
Luminol test
Kastle-Meyer color test
Hematest
A serologist needs to determine the blood type found at a crime scene. He determines that the individual's blood agglutinated with B type blood or A antibodies; therefore the person had ___ type blood.
A
AB
O
B
A serologist needs to determine the blood type found at a crime scene. He determines that the individual's blood agglutinated with both A and B type blood; therefore the person had ___ type blood.
O
A
B
AB
A blood droplet that is perfectly round would have an angle of impact of:
90 degrees
45 degrees
30 degrees
80 degrees
The shape of a blood droplet depends on:
all of the answers are correct
height
angle
type of surface
Secretors are:
people who have blood-type antigens in high concentration in their body fluids
people who secrete a different type of saliva
people who secrete a type of bacteria
people who have blood-type antibodies in high concentration in their body fluids
When a blood stain is determined to be "cast off", this means that:
the blood that is thrown from an object in motion
the blood that is directed back toward the source of energy
wet blood is transferred to a surface that did not have blood on it
a non-blood-bearing object moves through a wet bloodstain, altering the appearance of the original stain
When a blood droplet hits a rough surface, the edges of the droplet will be:
scalloped (or have ridges)
elliptical
round
smooth
DNA looks like:
a double helix
a single strand
a triple helix
a circle
Which of the following items would NOT be a potential source of DNA?
Hair without the root
Hair with the root
Teeth
Saliva
Blood
Which pairing of bases is correct in a DNA molecule?
adenine and thymine
cytosine and thymine
guanine and thymine
adenine and guanine
Which region of the DNA sequence below is repeated 3 times in the following sequence:
TGCACGATCATCATCATAGCCCT
TCA
TGC
CAT
TAG
Mitochondria are found within the cell’s nucleus.
True
False
The heavier, denser molecules move the furthest on an electrophoresis gel.
True
False
To characterize DNA using RFLP, the DNA must be cut into smaller pieces using:
restriction enzymes
VNTRs
STRs
retraction enzymes
The person responsible for the development of PCR testing is (was):
Kary Mullis
Rosalind Franklin
Francis Crick
James Watson
Alec Jeffreys
On human chromosomes, the locus (location) marked AMEL is a person's:
gender
eye color
age
race
At a particular STR locus on a person's chromosomes, if they have 2 DIFFERENT lengths of the STR repeat, how is it calculated for frequency? The multiplication process is:
2x (1st # of repeats x 2nd # of repeats)
2x (# of repeats)
2x (# of repeats2)
(# of repeats2)
