DNA Retest

The structure of DNA is a:

• triple helix
• double helix
• single helix
• what the heck is a helix

Which of the following are not sources of DNA?

• Blood
• Semen
• Hair
• Clothes

What does CODIS stand for?

• Criminal Offense DNA Index System
• Criminal Offensive DNA Index Securities
• Combined DNA Index Securities
• Combined DNA Index System 

How many STR markers/loci does the FBI use to identify criminals in America?

• 17
• 4
• 26
• 13

What does PCR stand for?

• Poly-ambiguous chain reaction
• Pentahedral corrosion remnant
• Polymerase chain reaction
• Peroxide corrosion remnant

Based on these results whose blood was found in the blood stain at the crime scene?

• Bob
• Sue
• John
• Lisa

Which DNA strands move the fastest through the gel when the electricity is turned on?

• The long strands
• The short strands
• The medium strands
• They all move the same

Which tissue samples are used for DNA fingerprinting? 

• Hair with follicular tag
• Skin
• Blood 
• Any of the above

DNA can have forensic value even if it is decades old.

• True 
• False

Why do you use a new pipette tip on the micropipette every time you get a new sample?

• To avoid contaminating the other samples
• To use as many tools as you can.
• The pipette tips disappear after being used.
• None of these reasons