Special Applications of DNA
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Questions and Answers

What method do companies like Ancestry and 23andMe use to trace ancestry?

  • Skin cell testing
  • Saliva sample comparison (correct)
  • Blood sample analysis
  • Hair follicle examination

    • What is a key feature of DNA that allows forensic scientists to identify individuals?

  • The sequence of amino acids
  • Unique combinations of polymorphisms (correct)
  • The length of telomeres
  • The presence of mitochondria

    • How can DNA analysis help in paternity cases?

  • By confirming a person's age
  • By comparing DNA sequences (correct)
  • By determining ethnic background
  • By identifying genetic disorders

    • What notable case combined DNA ancestry analysis and forensic science?

    <p>The Golden State Killer case</p> Signup and view all the answers

    What has DNA analysis contributed to in legal cases?

    <p>Proving or disproving innocence</p> Signup and view all the answers

    What characteristic of polymorphisms makes them useful in forensic science?

    <p>They are unique to each individual</p> Signup and view all the answers

    Which of the following is NOT a typical application of DNA analysis?

    <p>Genetic engineering of crops</p> Signup and view all the answers

    What is the primary material collected for ancestry tracing by companies?

    <p>Saliva samples</p> Signup and view all the answers

    What can forensic scientists use DNA analysis to determine?

    <p>A person's genetic donor</p> Signup and view all the answers

    How can DNA findings assist in resolving wrongful accusations?

    <p>By matching DNA evidence to profiles</p> Signup and view all the answers

    DNA analysis can only be used for paternity testing.

    <p>False</p> Signup and view all the answers

    Polymorphisms are unique combinations in an individual's DNA that can be used to identify them.

    <p>True</p> Signup and view all the answers

    Ancestry tracing can provide clues about a person's country of origin.

    <p>True</p> Signup and view all the answers

    The Golden State Killer case involved DNA comparisons with a genetic genealogy database.

    <p>True</p> Signup and view all the answers

    DNA samples cannot provide evidence in court to determine a person's innocence.

    <p>False</p> Signup and view all the answers

    The ability of DNA analysis to identify individuals has had no impact on forensic science.

    <p>False</p> Signup and view all the answers

    Angelina was interested in her family history which led her to DNA analysis for ancestry.

    <p>True</p> Signup and view all the answers

    Maradona's public acknowledgment of Diego Jr. came as a surprise due to negative results from a paternity test.

    <p>False</p> Signup and view all the answers

    Each individual has a unique DNA profile that remains completely unchanged throughout their life.

    <p>False</p> Signup and view all the answers

    DNA can only be extracted from blood samples in forensic investigations.

    <p>False</p> Signup and view all the answers

    Study Notes

    DNA Applications

    • DNA analysis has many uses, including tracing ancestry, diagnosing hereditary diseases, Covid-19 testing, paternity testing, forensics, and more.
    • Sequencing the human genome has led to improved DNA analysis methods.

    Ancestry Tracing

    • DNA analysis helps people learn about their family history and origins.
    • Companies like Ancestry and 23andMe compare individual DNA to others, providing insights into genetic heritage.
    • Example: Angelina used DNA to learn more about her ethnicity.

    Forensics

    • Polymorphisms (variations in non-coding DNA) are unique to each individual, creating a genetic fingerprint.
    • A unique combination of polymorphisms allows for identification of individuals.
    • Forensic science uses DNA to identify suspects or exonerate the wrongly accused.
    • Even small samples can be analyzed to identify the donor.
    • Example: Forensic analysis helped to identify Joseph James DeAngelo (Golden State Killer).

    Paternity

    • DNA analysis can determine family relationships, including paternity.
    • Example: Maradona acknowledged his son after a paternity test.
    • DNA analysis techniques were instrumental in solving the Golden State Killer case by identifying a distant relative of the suspect through DNA and genetic genealogy.

    Combining Ancestry and Forensics

    • By leveraging genetic genealogy databases, investigators tracked down the Golden State Killer through comparing crime scene DNA to relatives who share similar genetic markers.
    • The comparison to genetic genealogy databases, along with other investigative leads, helped narrow down the suspect pool.

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    Description

    Explore the various applications of DNA analysis, including its roles in ancestry tracing, forensic science, and paternity testing. Learn how DNA can reveal family history, serve as a genetic fingerprint for identification, and provide insights into hereditary diseases. This quiz covers notable examples and techniques in the realm of DNA analysis.

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