DNA Evidence

Gum is found at the scene of a robbery - it may have been left by the thief! A DNA Fingerprint is made of the saliva on the gum, along with the three suspects. None of the suspects' DNA Fingerprints match the gum. Which of the following is TRUE about this case?

• DNA Fingerprints sometimes change, so we can not rule out any suspects yet

• The DNA Fingerprinting must have been done wrong

• Since the DNA Fingerprint did not match any suspect, none of these suspects is the thief

• Since the DNA Fingerprint did not match any suspect, none of these suspects left the gum

Is DNA Evidence Class or Individual?

• Individual

• Class

Tags

NGSS.HS-LS3-1

Why is DNA Fingerprinting called a 'fingerprint'?

• All of a person's DNA is found in their fingers

• A person's DNA Fingerprint looks the same as a person's finger fingerprint

• Everyone's finger fingerprint is unique, just as everyone's DNA Fingerprint is unique

• The tool used to make a DNA Fingerprint is called 'The DNA Fingerprint Machine'

What is the first step to making a DNA Fingerprint?

• Make millions of copies of the DNA

• Cut the DNA into different sized pieces

• Separate the DNA pieces by size

• Compare DNA fingerprints, find a match

What is the third step to making a DNA Fingerprint?

• Make millions of copies of the DNA

• Cut the DNA into different sized pieces

• Separate the DNA pieces by size

• Compare DNA fingerprints, find a match

During the Cut step, why would your DNA be cut into different sized pieces than your neighbor's DNA?

• different restriction enzyme is used

• Your DNA has a different sequence than your neighbor's

• Restriction enzymes cut randomly, no two Fingerprints are ever the same

• DNA samples are heated to different temperatures, causing DNA to break into different sized pieces

Tags

NGSS.HS-LS3-2

Pattern of DNA fragments obtained by examining a person's unique sequence of DNA base pairs is?

• PCR

• Chromosome

• Electrophoresis

• DNA Fingerprinting

Which of the following contain molecules of DNA? Choose all that apply.

• Saliva

• Blood

• Hair

• Fragments of Skin

Tags

NGSS.MS-LS3-1

In gel electrophoresis, the largest DNA fragment will appear

• closest to the starting wells

• farthest from the starting wells

• three quarters away from the starting wells

• it depends on how many fragments there are

Tags

SFS3

DNA is found in all cells that have a _____________.

• chromosome

• nucleus

• CODIS

• napalm

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-1