Question

Size of VNTR varies from

• A. 0.01 to 20kb
• B. 0.1 to 20kb
• C. 0.01 to 10 bp
• D. 0.1 to 10 bp

Answer 1

The correct option is B 0.1 to 20kb

In the density gradient centrifugation, genomic DNA forms two peaks. The bigger and broader one represents the bulk genomic DNA while the smaller one represents satellite DNA. The satellite DNA is further classified as micro- or mini-satellite on the basis of base composition, length of the segment, and the number of repetitive units.
VNTRs belong to the minisatellite which is arranged tandemly in many copies.
These VNTRs vary from chromosome to chromosome in an individual. Its size varies from 0.1 to 20kb.