BSFS Bachelor of Science in Forensic Science 3

Question 1

Which technique is used to separate DNA fragments by size during forensic DNA analysis?

Accepted Answer

Agarose gel electrophoresis

Answer

Agarose gel electrophoresis uses an electric field to separate DNA fragments by size, with smaller fragments migrating farther through the gel.

Question 2

In bloodstain pattern analysis, what does a 'satellite stain' indicate?

Accepted Answer

A small droplet that broke away from a larger impact stain

Answer

Satellite stains are small secondary droplets that break off from a parent drop upon impact and land near the main stain.

Question 3

What is the primary purpose of CODIS in the United States?

Accepted Answer

To store and search DNA profiles from crime scenes and offenders

Answer

CODIS (Combined DNA Index System) is the FBI's national DNA database that allows forensic labs to compare DNA profiles from crime scenes with known offender profiles.

Question 4

Which type of evidence is considered 'class evidence' rather than 'individual evidence'?

Accepted Answer

Fibers that match the manufacturer's lot but not a specific garment

Answer

Class evidence can only narrow the source to a group or category, not to a single unique source; fibers matching a manufacturer's lot are class evidence.

Question 5

What is rigor mortis and when does it typically begin?

Accepted Answer

Muscle stiffening due to ATP depletion; begins 2-6 hours after death

Answer

Rigor mortis is the temporary stiffening of muscles after death caused by ATP depletion; it typically begins 2-6 hours postmortem and resolves within 24-48 hours.

BSFS - Bachelor of Science in Forensic Science Practice Test

BSFS - Bachelor of Science in Forensic Science Practice Test

BSFS Bachelor of Science in Forensic Science 3