DNA Fingerprinting Review

Front

What is DNA fingerprinting?

Back

DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles.

Front

What role does gel electrophoresis play in DNA fingerprinting?

Back

Gel electrophoresis is used to separate DNA fragments based on their size, allowing for the analysis of DNA profiles.

Front

What is the significance of STR loci in DNA profiling?

Back

Short Tandem Repeats (STR) loci are specific locations on the DNA that are analyzed for variations to create a DNA profile.

Front

How many STR loci are typically analyzed for a DNA profile?

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Prior to 2017, 13 STR loci were commonly used for DNA profiling.

Front

Why does DNA move towards the positive electrode during gel electrophoresis?

Back

DNA is negatively charged, so it is attracted to the positive end of the electrophoresis unit.

Front

What is the normal number of chromosomes in a human cell?

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A normal human cell has 46 chromosomes.

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What is the principle behind the uniqueness of DNA profiles?

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No two individuals, except identical twins, have exactly the same DNA, making DNA profiles unique.

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What is the purpose of using a DNA profile in forensic science?

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DNA profiles are used to match biological samples from crime scenes to potential suspects.

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What is the process of PCR and its relevance to DNA fingerprinting?

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Polymerase Chain Reaction (PCR) is a technique used to amplify small segments of DNA, making it easier to analyze for fingerprinting.

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What are the limitations of DNA fingerprinting?

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Limitations include the potential for contamination, the need for quality samples, and ethical concerns regarding privacy.