Exploring DNA Fingerprinting in Forensic Science

The video explains how DNA fingerprinting is used to identify individuals from samples collected at a crime scene. It describes the process of extracting DNA, cutting it into fragments, and using gel electrophoresis to separate these fragments. The unique pattern of DNA bands is then compared to samples from suspects to identify a match, helping solve crimes by linking individuals to crime scenes.

What evidence did the burglar leave behind at the crime scene?

• A note on the table

• Blood on the broken glass

• A fingerprint on the door

• A shoe print in the garden

What is the first step forensic scientists take when investigating samples from a crime scene?

• Compare DNA patterns

• Cut DNA into fragments

• Extract DNA from cells

• Place DNA in a gel

How are DNA fragments separated in the lab?

• By heating the DNA

• Using an electric current

• By freezing the DNA

• Using a chemical reaction

What determines how far DNA fragments travel in the gel?

• The temperature of the gel

• The type of gel used

• The size of the fragments

• The color of the fragments

What produces a unique pattern that can be used to identify a person?

• The unique set of DNA fragments

• The length of the DNA strands

• The type of cells used

• The color of the DNA

How do police confirm the identity of a suspect using DNA fingerprinting?

• By matching the DNA pattern with a sample from the crime scene

• By comparing the suspect's fingerprint with the crime scene

• By analyzing the suspect's handwriting

• By checking the suspect's alibi