Short Tandem Repeats (STRs) are described as:

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Short Tandem Repeats (STRs) are described as:

Short Tandem Repeats are repeating units of DNA that are short (typically 2–6 base pairs) and occur in tandem, with the number of repeats at a given locus varying from person to person. This variable copy number makes STRs highly polymorphic, which is why they’re so useful for distinguishing individuals in genetic profiling. The description that STRs are polymorphisms consisting of short sequences repeated multiple times captures both the short motif and the tandem repetition, along with the variability that defines them. The other options mischaracterize the concept: one uses an imprecise term, another references something not relevant to STRs, and the telomere-focused option points to a specific chromosomal end sequence rather than the broad, variable STR loci used in practice.

Short Tandem Repeats are repeating units of DNA that are short (typically 2–6 base pairs) and occur in tandem, with the number of repeats at a given locus varying from person to person. This variable copy number makes STRs highly polymorphic, which is why they’re so useful for distinguishing individuals in genetic profiling. The description that STRs are polymorphisms consisting of short sequences repeated multiple times captures both the short motif and the tandem repetition, along with the variability that defines them. The other options mischaracterize the concept: one uses an imprecise term, another references something not relevant to STRs, and the telomere-focused option points to a specific chromosomal end sequence rather than the broad, variable STR loci used in practice.

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