Multiple Choice
Why is it necessary to extract DNA from blood left at a crime scene during forensic investigations?
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7. DNA and Chromosome Structure
DNA as the Genetic Material
Multiple Choice
Which of the following best explains how DNA can be used to help solve a crime?
A
By using DNA to predict the exact time a crime occurred
B
By comparing DNA samples from a crime scene to those of suspects to identify a match
C
By determining the age of a suspect based on their DNA sequence
D
By analyzing DNA to reconstruct the physical appearance of the victim
Verified step by step guidance1
Understand that DNA contains unique genetic information for each individual (except identical twins), which can be used as a biological fingerprint.
Recognize that DNA samples collected from a crime scene can be compared to DNA samples from suspects to check for matches.
Learn that matching DNA profiles between a crime scene sample and a suspect's sample can help identify or exclude individuals involved in the crime.
Note that DNA cannot be used to predict the exact time a crime occurred or determine the age of a suspect directly from the sequence.
Understand that while DNA can sometimes provide clues about physical traits, reconstructing a victim's appearance solely from DNA is not currently precise enough for forensic identification.
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