Ch 7 DNA Profiling

Who invented the DNA fingerprinting method?

• Francis Henry Galton

• Sir Alec Jeffreys

• Dr. Alec May

• Edmond Locard

DNA Fingerprinting has been used to solve crimes, but it has also been used to:

• determine paternity

• examine biodiversity

• identify unknown soldiers

• identify victims in the 911 terrorist attacks

• DNA fingerprinting has not been used for any of these reasons.

The backbone or "sides" of the DNA ladder consists of

• nitrogenous bases and phosphate groups

• sugar and phosphate groups

• DNA

• nitrogenous bases

_____ are non-coding segments of DNA that are most useful to Forensic Scientists as evidence.

• tandems

• exons

• introns

• histones

____ are repeating base sequences that are unique to individuals and useful in Forensic Science.

• polymorphisms

• exons

• bands

• tandems

What technique is used to make copies of segments of DNA for analysis?

• Polymerase Chain Reaction

• Gel Electrophoresis

• DNA Fingerprinting

• Short Tandem Repeats

DNA fragments can be sorted according to their size by the technique of ____.

• polymorphisms

• gel electrophoresis

• polymerase chain reaction

• short tandem repeats

Which of the following are ways to prevent contamination of DNA collected from the crime scene? Mark all that apply!

• gloves

• avoid coughing or sneezing

• freeze the evidence, if needed

• use plastic bags to store the evidence

When performing gel electrophoresis, one well should contain a control sample. What should the other wells contain?

• DNA from a known standard and a marker

• DNA from the crime scene, victim, and suspects

• DNA from the marker only

• DNA from the crime scene and suspect

Encoded DNA; the portion of DNA with directions to build molecules is called:

•  Exons      
• Polymorphism
• Primers
• Introns