Question

Which one of the following DNA sequences can act as genetic markers?

• A. Variable number tandem repeat (VNTR)
• B. Long interspersed nuclear elements (LINES)
• C. Short interspersed nuclear elements (SINES)
• D. Long terminal repeats (LTRS)

Hint:

VNTRs are the foundation of "DNA Fingerprinting."

Answer 1

The Correct Option is A

Step 1: Concept
A genetic marker is a DNA sequence with a known physical location on a chromosome that can be used to identify individuals or species.

Step 2: Analysis of VNTRs
VNTRs are locations in a genome where a short nucleotide sequence is organized as a tandem repeat. These are highly polymorphic between individuals.

Step 3: Reasoning
Due to their high variability, VNTRs are standardly used in DNA profiling and linkage analysis. SINES (like Alu) are repetitive but less commonly used as variable individual markers compared to VNTRs.

Step 4: Conclusion
VNTR is the correct marker. Final Answer: (A)