The size of VNTR shows high variations, from 0.1 to 20 kb, because
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a
The number of repeats show high degree of polymorphism
b
VNTR do not have any coding functions
c
The sensitivity of DNA fingerprinting has been increased by use of PCR
d
Mutations VNTR impact in an individual’s reproductive ability
answer is A.
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Detailed Solution
The VNTR belongs to a class of satellite DNA referred to as mini-satellite. A small DNA sequence is arranged tandemly in many copy numbers. The copy number varies from chromosome to chromosome in an individual. The numbers of repeat show very high degree of polymorphism. As a result the size of VNTR varies in size from 0.1 to 20 kb.