Vector

- A self-replicating DNA molecule that transfers a DNA segment between host cells
http://ord.aspensys.com/asp/resources/glossary_s-z.asp#V

- In DNA cloning, the plasmid or phage chromosome used to carry the cloned DNA segment.
Definition from:
http://www.biochem.northwestern.edu/holmgren/Glossary/Definitions/Def-V/vector.html

- See Cloning vector

Vectorette PCR

- Is a method that enables the amplification of specific DNA fragments in situations where the sequence of only one primer is known. Thus, it extends the application of PCR to stretches of DNA where the sequence information
is only available at one end.
Definition from:
Vectorette PCR: a novel approach to genomic walking
Arnold and Hodgson 1991

See more about Vectorette PCR

VNTR ( variable number of tandem repeats )

- Locus that is hypervariable because of tandemly repeated DNA sequences. Presumably variability is generated by unequal crossing over or slippage during replication. A chromosomal locus at which a particular repetitive sequence is present in different numbers in different individuals of a population or in the two different chromosome homologues in one diploid individual.
Definition from:
http://www.biochem.northwestern.edu/holmgren/Glossary/Definitions/Def-V/VNTR.html

- Linear arrangement of multiple copies of short repeated DNA sequences that vary in length and are highly polymorphic, making them useful as markers in linkage analysis
Definition from:
Genetests

- A class of polymorphism characterised by the highly variable copy number of identical or closely related sequences.
Definition from:
http://www.igd.cornell.edu/MolecularMarkers/Glossary.pdf