Unit 3 Quiz

Which of the following is NOT a source of DNA?

• Blood spatter

• Semen

• Saliva

• Fingerprints

What is the function of DNA in a cell?

• to identify the suspect

• to hold genetic information

• to give the cell structure

• to fight against infection

What is the correct way that nitrogenous bases are paired?

• A - T ; G - C

• A - G ; T - C

• C - A ; T - G

• None of these

How many chromosomes are there in a human body cell?

• 23

• 46

• 50

• 36

True or False: No two people on earth have the exact same DNA.

• True

• False

Which of the following can negatively affect collected DNA samples?

• Wearing disposable gloves

• Using paper containers

• Using plastic containers

• Keeping evidence dry during transportation

What does 'homozygous' mean?

When someone has ...

• ... two different copies of alleles for one gene

• ... two of the same copies of alleles for one gene

• ... one allele from each parent; one from mom and one from dad

• ... only one allele for one gene

Which of the following STR diagrams best depicts a homozygous individual?

• 
• 
• 
• 

Which of the following statements are the most accurate? Select all that apply.

• DNA evidence is used to compare evidence from the scene to the DNA of known individuals

• DNA evidence is only used to identify suspects

• DNA evidence can always be used to eliminate suspects, but cannot always be used to identify them

• It is much harder to eliminate a suspect based on DNA evidence than it is to identify them

What does CODIS stand for?

• Combined DNA Index System

• Color-coded DNA Information System

• Coordinated Database Intergenetic System

• Coordinated DNA Information System