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DNA Fingerprint
By Heidi Cooley
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Last updated over 3 years ago
5 questions
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1
1
1
The steps of gel electrophoresis are below. They are not in the correct order.
Load the DNA into the wells of the gel. Include a DNA control for comparison.
Watch as the smaller DNA fragments move toward the positive end of the gel.
Cut DNA into fragments with restriction enzymes
Connect the gel chamber to an electrical current.
Stain the DNA bands to make them easily visible.
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Question 1
1.
When creating a DNA fingerprint to solve a crime, it should involve DNA from what sources? CHECK ALL THAT APPLY
Crime Scene
Victim
Suspects
Children of Suspects
Spouse of Victim
Question 2
2.
Which of the following is true about gel electrophoresis?
Smaller DNA fragments move faster and farther than larger DNA fragments
Larger DNA fragments move faster and farther than smaller DNA fragments
All DNA fragments move at the same rate despite their size
Question 3
3.
Why is a victim's DNA included in a DNA fingerprint?
To know if the DNA (possibly from blood) is from the victim
To determine if the victim actually died or was injured
To exclude the victim as a suspect
It doesn't need to be included
Question 4
4.
Using the steps above, what is the correct order of the steps for creating a DNA fingerprint?
1, 2, 4, 5, 3
3, 1, 4, 2, 5
5, 3, 4, 2, 1
4, 5, 2, 3, 1
Question 5
5.
What is the purpose of PCR (polymerase chain reaction)?
Create many copies of the same DNA evidence
Create one master copy of DNA evidence
Separate DNA into small fragments
Combine DNA into one long fragment