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Q.

Choose correct set of statements about repetitive DNA 

(A) These sequences are of no transcriptional function 

(B) VNTR belongs to a class of satellite DNA 

(C) These help to identify a person on the basis of its DNA specificity 

(D) They form basis for DNA finger printing 

(E) They are not heritable

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a

A, B only

b

B, C, E

c

All except E

d

A, C, D only

answer is D.

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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.

These sequences normally do not code for any proteins, but they form a large portion of human genome. These sequence show high degree of polymorphism and form the basis of DNA fingerprinting. Polymorphisms are inheritable from parents to children.

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Choose correct set of statements about repetitive DNA (A) These sequences are of no transcriptional function (B) VNTR belongs to a class of satellite DNA (C) These help to identify a person on the basis of its DNA specificity (D) They form basis for DNA finger printing (E) They are not heritable