DNA Forensics in Human Biotechnology

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What is the main focus of DNA forensics?

Apprehending suspects in criminal investigations (correct)

Tracking historical trends in mankind

Identifying endangered species

Resolving food-borne epidemics

In forensic cases, what is the purpose of matching a suspect with evidence?

Assessing the suspect's blood type

Linking the suspect to the crime scene (correct)

Identifying the suspect's ancestral lineage

Exonerating the suspect

Which of the following is NOT a potential source of biological evidence in forensic investigations?

Semen

Saliva

Blood

Fingerprint (correct)

What method was previously the most reliable for identifying individuals before the advent of DNA typing?

ABO blood grouping system Signup and view all the answers

What is the main purpose of paternity testing in DNA forensics?

Establishing the biological father of a child Signup and view all the answers

How does DNA typing exclude suspects in a criminal investigation?

By matching their DNA profile with the crime scene sample Signup and view all the answers

Why are DNA fingerprints more stable and have more markers compared to the ABO system?

DNA is stored in the nucleus, providing a more stable source for identification. Signup and view all the answers

Why are fingerprints useful in identifying contributors at a crime scene?

Fingerprints are unique for each individual and are left behind by everyone. Signup and view all the answers

How do identical twins differ in their fingerprints despite sharing the same DNA fingerprints?

Their fingerprints develop differently due to environmental factors. Signup and view all the answers

Why do current DNA tests for forensic investigations not provide information on race or physical characteristics?

Genes related to race and physical traits are not examined in current forensic DNA tests. Signup and view all the answers

How does the genome of each individual contribute to the uniqueness in DNA identification?

The genome contains genetic information from both parents, creating variability. Signup and view all the answers

How does DNA testing assist in differentiating between individuals?

Small variations in an individual's DNA result in different genetic profiles. Signup and view all the answers

Why is RFLP analysis not always possible in forensic cases?

When the DNA is old and degraded Signup and view all the answers

What complicating factor arises in RFLP analysis when multiple individuals contribute to an evidentiary sample?

Mixtures of DNA profiles Signup and view all the answers

Where do typically non-sperm cells in sexual assault evidence originate from in victims?

Vaginal epithelium Signup and view all the answers

What is the purpose of the differential extraction procedure in DNA analysis?

To separate sperm cells from everything else Signup and view all the answers

What challenge arises in non-sexual assault evidence with body fluid mixtures that do not contain semen?

Difficulty in differentiating DNA profiles Signup and view all the answers

Why does RFLP analysis require a greater amount of better quality DNA compared to newer STR PCR based techniques?

Because it can detect hyper variability at each locus Signup and view all the answers

DNA Forensics in Human Biotechnology

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Questions and Answers

What is the main focus of DNA forensics?

In forensic cases, what is the purpose of matching a suspect with evidence?

Which of the following is NOT a potential source of biological evidence in forensic investigations?

What method was previously the most reliable for identifying individuals before the advent of DNA typing?

What is the main purpose of paternity testing in DNA forensics?

How does DNA typing exclude suspects in a criminal investigation?

Why are DNA fingerprints more stable and have more markers compared to the ABO system?

Why are fingerprints useful in identifying contributors at a crime scene?

How do identical twins differ in their fingerprints despite sharing the same DNA fingerprints?

Why do current DNA tests for forensic investigations not provide information on race or physical characteristics?

How does the genome of each individual contribute to the uniqueness in DNA identification?

How does DNA testing assist in differentiating between individuals?

Why is RFLP analysis not always possible in forensic cases?

What complicating factor arises in RFLP analysis when multiple individuals contribute to an evidentiary sample?

Where do typically non-sperm cells in sexual assault evidence originate from in victims?

What is the purpose of the differential extraction procedure in DNA analysis?

What challenge arises in non-sexual assault evidence with body fluid mixtures that do not contain semen?

Why does RFLP analysis require a greater amount of better quality DNA compared to newer STR PCR based techniques?

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