Cloning Vectors
Difference between λ gt 10 and λ gt 11 vectors is that

λ gt 11 is a replacement vector
λ gt 11 is an expression vector
λ gt 10 is a replacement vector
λ gt 10 is an expression vector

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Cloning Vectors
Cosmids lack

genes coding for viral proteins
marker genes coding for replication
cleavage site for the insertion of foreign DNA
origin of replication

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