When DNA with variable number tandem repeats (VNTRs) is visualized on a gel, the resulting fragments separate according to their:
A)A-T content.
B)G-C content.
C)color.
D)size.
E)shape.

Question

Quizplus · Accepted Answer

VNTRs are fragments of DNA that have different lengths due to the variable number of repeats of a particular sequence. When visualized on a gel, the fragments separate according to their size, with smaller fragments migrating further than larger fragments. Therefore, the correct choice is size (D).

When DNA with Variable Number Tandem Repeats (VNTRs) Is Visualized