Cosmid -

Because they can carry large chunks of DNA, fewer "clones" are needed to represent an entire organism's genome.

Using viral infection to deliver DNA is significantly more efficient than chemical transformation or electroporation, especially for large molecules. cosmid

A DNA sequence that allows the cosmid to replicate independently within a bacterial host, just like a standard plasmid. Because they can carry large chunks of DNA,

A cosmid is an artificial cloning vector that combines properties of a bacterial with the cos sites derived from the lambda ( ) bacteriophage . cosmid