Question

The variation in the number of tandem repeats between two or more individuals is called:

• A. Variable number of tandem repeats (VNTRs)
• B. Restriction fragment length polymorphism (RFLP)
• C. Simple sequence repeats (SSRs)
• D. Amplified fragment length polymorphism (AFLP)

Hint:

VNTRs are variations in the number of repeating DNA sequences, widely used in forensic and genetic studies.

Answer 1

The Correct Option is A

Step 1: Understanding Tandem Repeats 
Tandem repeats are short DNA sequences that are repeated one after another. Variations in the number of these repeats between individuals are known as VNTRs.
Step 2: Evaluating the Options 
- Variable number of tandem repeats (VNTRs): Correct, this refers to the variation in the number of tandem repeats between individuals. 
- Restriction fragment length polymorphism (RFLP): Involves variations in DNA fragment lengths due to restriction enzyme digestion. 
- Simple sequence repeats (SSRs): Refers to microsatellites, short, repetitive sequences, but not directly to tandem repeat number variation. 
- Amplified fragment length polymorphism (AFLP): A technique for detecting polymorphisms based on selective amplification of DNA fragments. 
Step 3: Conclusion 
VNTRs refer to variations in tandem repeat numbers between individuals.