DNA Fingerprinting / Genetics Unit

Approximately how many base pairs (bp) would be in the DNA fragment visualized on the example gel below?

• 200 bp

• 300 bp

• 500 bp

• 1000 bp

Which of the following best describes PCR?

• a technique used to separate DNA fragments based on size and visualize them

• a technique used to make many copies of a specific region of DNA

• a technique used to make many copies of the entire DNA sequence

• a technique used to purify DNA

Which of the following best describes gel electrophoresis?

• a technique used to make many copies of a specific region of DNA

• a technique used to make many copies of the entire DNA sequence

• a technique used to separate DNA fragments based on size and visualize them

• a technique used to purify DNA

How do VNTR alleles differ?

• in the number of repeats

• in the sequence that is repeated

• in their type of dominance

• in their color

Which of the following DNA fragment sizes would be closer to the bottom of the gel?

• 250 bp

• 500 bp

• 750 bp

• 1000 bp

Which suspect (S) is most likely to be guilty of the crime committed based on DNA evidence left at the crime scene (CS)?

• S1

• S2

• S3

• ladder

Which of the following is an example of a hypervariable locus?

• Short Tandem Repeats (STR)

• Single Nucleotide Polymorphism (SNP)

• Gene for ear lobe attachment

• All genes are hypervariable

Which of the following best describes DNA fingerprinting?

• Determining what our finger's fingerprints should look like from DNA

• Using fingerprints to determine someone's DNA sequence

• Using DNA sequences at multiple hypervariable loci to identify individuals

• Using the DNA sequence at one hypervariable locus to identify individuals

Which of the following best describes a VNTR?

• Any gene on a chromosome

• Sections of DNA that have no repeats

• Single nucleotide differences between different alleles

• A DNA locus that has a short sequence repeated many times

How many fragment bands will show on a gel if the individual is homozygous for the allele being visualized?

• 1

• 2

• 3

• 4