In $1980$,$F$. Sanger was awarded the Nobel Prize for the second time,sharing it with Gilbert and Maxam for their work on:

Which of the following does not code for any proteins?

Alec Jeffreys used $ . . . . . . $ as a genetic marker.

Given below are two statements.
Statement $I$ - In the population,every person shows unusual sequences of $20-100$ base pairs,which are repeated several times and are termed as $VNTRs$.
Statement $II$ - $VNTRs$ are same in each individual and hence is the key factor in $DNA$ profiling.
In the light of above statements,select the correct option given below:

Provide information about $VNTR$.

One of the most frequently used techniques in $DNA$ fingerprinting is