Answer :
Final answer:
DNA profiling focuses on the 0.1 percent of DNA that varies among individuals. This small percentage contains unique genetic markers that distinguish each person. Techniques often used include analyzing short tandem repeats (STRs) and single nucleotide polymorphisms (SNPs).
Explanation:
Understanding DNA Profiling
Humans share approximately 99.9 percent of the same DNA sequence, but the key to profiling an individual's DNA lies in the 0.1 percent difference. This small fraction represents the unique variations that make each person distinct. DNA profiling is commonly performed by analyzing individual differences in this 0.1 percent of DNA, specifically by looking at regions known as short tandem repeats (STRs) and single nucleotide polymorphisms (SNPs).
Why Profile the 0.1 Percent?
While the vast majority of our DNA is the same, it is the relatively minor differences that allow scientists and forensic experts to create genetic profiles. For example, in criminal investigations or paternity tests, the analysis of these differences can provide definitive evidence of identity.
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