Question

The size of VNTR varies from:

• A. 0.1 to 20 kb
• B. 0.1 to 10 kb
• C. 0.2 to 15 kb
• D. 0.2 to 10 kb

Answer 1

The Correct Option is A

Variable Number Tandem Repeats (VNTRs) are a type of genetic marker that consists of a location in the genome where a short nucleotide sequence is organized as a tandem repeat. The number of repeat units at a specific location varies between individuals in a population, making them useful for forensic analysis and genetic profiling. 

One key characteristic of VNTRs is their size variation. The size of a VNTR is determined by the number and length of the repeat units they contain, which can vary significantly across different VNTR loci.

The correct size range for VNTRs is 0.1 to 20 kilobases (kb), as this range encompasses the majority of VNTRs found within the human genome. This variability in size between different VNTRs makes them particularly useful for distinguishing genetic differences between individuals, as well as for studying genetic relationships and evolutionary processes.

Size Range	Description
0.1 to 20 kb	Correct size range for VNTRs
0.1 to 10 kb	Incorrect, underestimates maximum range
0.2 to 15 kb	Incorrect, limits minimum and maximum
0.2 to 10 kb	Incorrect, limits minimum and maximum

Understanding the correct size variation of VNTRs helps in correctly applying their use in genetic and forensic analysis, ensuring precise results are achieved.

Answer 2

VNTR (Variable Number Tandem Repeats) refers to a region of DNA where a short nucleotide sequence is repeated multiple times in a row. The number of repeats can vary significantly between individuals.

The size of the VNTR typically ranges from 0.1 to 20 kilobases (kb). These variations are useful in genetic analysis, such as DNA fingerprinting, for identifying genetic differences between individuals.