Question

To identify people by dna, is it better to make copies of genes or non-coding segments? Explain.

Answer 1

To identify people by DNA it is better to make copies of non-coding segments because they exhibit more variation than genes.

• The polymorphic sequences of non-coding DNA vary between individuals in humans.
• Variable number tandem repeats, or VNTRs, are created when DNA sequences are repeatedly replicated in the genome's non-coding regions.
• It is possible to create a person's genetic fingerprint by counting the amount of repeats, which varies between individuals.
• However, this non-coding DNA is used in criminal investigations by forensic experts.
• There are distinctive repeating patterns found inside this area of DNA that can be utilized to distinguish one person from another.
• Short tandem repeats (STRs) are a type of pattern that can be measured to determine a person's DNA profile.

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