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DNA contamination is an important issue in a criminal laboratory, because it can impact the outcome of a case in ways which can send innocent people to jail or set free someone who is guilty. A few ways that DNA can be contaminated areÊby transfer of DNA in the lab due to improper handling and by making assumptions about the presence of DNA on an object without verifying how it may have gotten there by examining other evidence to corroborate theories.

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15y ago

When there's a mutation, which can vary from point-mutation where one nucleotide is misplaced, to chromosomal mutations, where a chunk of chromosome is misplaced.

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Q: How can DNA gel electrophoresis get contaminated?
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Related questions

What is used to sort DNA into different lenghts?

Gel Electrophoresis


Is agarose gel electrophoresis suitable for only gram negative plasmid DNA?

Agarose gel electrophoresis is suitable for ALL DNA.


What do the bands in gel electrophoresis represent?

The bands in gel electrophoresis represent different sizes of DNA fragments.


How are DNA fragments separated on DNA fingerprinting?

Gel electrophoresis


How do you make DNA fingerprint?

gel electrophoresis


What is used to separate DNA fragments by size?

Electrophoresis. Restriction enzymes are used to cut DNA into fragments. Solutions containing these fragments are placed on the surface of a gel to which an electric current is applied. The electric current causes the DNA fragments to move through the gel. Because smaller fragments move more quickly than larger ones, this process separates the fragments according to size.


Process that restriction fragments of DNA are separated from each other by the use of electricity?

The process you are referring to is called electrophoresis. In this technique, DNA fragments are loaded onto a gel matrix and an electric current is applied. The negatively charged DNA molecules move towards the positive electrode, separating based on size and charge.


Which fragment moves the furthest in gel electrophoresis?

Smaller DNA fragments move faster and further in gel electrophoresis compared to larger fragments. The distance migrated by DNA fragments in gel electrophoresis is inversely proportional to their size.


What is done to the DNA to make the bands visible in gel electrophoresis?

In gel electrophoresis, DNA is treated with a dye that binds to the DNA molecules, making them visible as bands under ultraviolet light.


What do the multiple bands in gel electrophoresis represent?

The multiple bands in gel electrophoresis represent different sizes of DNA fragments.


How does gel electrophoresis work and what kind of information can you determine from gel electrophoresis?

Gel electrophoresis separates DNA or proteins based on size and charge by applying an electric field to move molecules through a gel matrix. Smaller molecules move faster and thus travel further in the gel. Gel electrophoresis can be used to determine the size, quantity, and purity of DNA fragments or proteins, as well as for DNA fingerprinting and genetic testing.


What causes the absence of bands in gel electrophoresis?

The absence of bands in gel electrophoresis can be caused by factors such as improper loading of samples, insufficient DNA concentration, or issues with the gel or electrophoresis equipment.