Tuesday, July 28, 2009

A genetic marker is _____.?

A) a place where a restriction enzyme cuts DNA





B) a chart that traces the family history of a genetic trait





C) a particular nucleotide sequence whose inheritance can be followed





D) a radioactive probe used to find a gene

A genetic marker is _____.?
C





Definitely not B, although you might use a genetic marker in a pedigree. A and D rely on a specific nucleotide sequence, so they are encompassed in answer C.
Reply:the correct ans is D...genetic markers are usually inserted into a plasmid which is then inserted into the host cell....the best example of a genetic marker is GFP protein which glows under UV light.


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