DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as :

The correct answer is Repetitive DNA.

Step-by-step Explanation:

1. DNA fingerprinting is a molecular biology technique used to identify and compare individuals based on unique patterns in their DNA sequence.

2. While 99.9% of the base sequence among humans is the same, the differences lie in specific regions of DNA sequence that show high variability. These specific regions are known as repetitive DNA.

3. Repetitive DNA consists of sequences where a small stretch of DNA is repeated multiple times head-to-tail. These repetitive sequences are separated from bulk genomic DNA as different peaks during density gradient centrifugation (with bulk DNA forming a major peak and the repetitive DNA forming smaller peaks called satellite DNA).

4. Since the frequency of repeats varies from person to person, analyzing these repetitive DNA sequences allows scientists to determine individual genetic identity.