What does VNTR stand for?

• A. Variable Number of Tandem Repeats
• B. Very Notable Tandem Repeats
• C. Variable Nucleotide Tandem Repeats
• D. Visible Number of Transcribed Repeats

Answer: (A)

The key idea here is knowing the exact acronym expansion used in genetics. VNTR stands for Variable Number of Tandem Repeats. It describes regions of DNA where a short sequence is repeated in a row, and the number of repeats varies from person to person. This variation in repeat count creates differences in DNA fragment lengths that can be detected and used for genetic analysis. The term highlights two things: the number of repeats can vary (variable) and the repeats are arranged back-to-back (tandem repeats). The other options aren’t standard terminology: they either change the meaning of the phrase or insert unrelated words, so they don’t describe the established concept.