What does the charge of DNA have to do with DNA fingerprinting?

Answer 1

DNA is of a negative charge. So when gel electrophoresis is used on it the DNA fragments are attracted to the positive end of the electrophoresis. The fragments of different lengths travel down the gel towards this end. The longer length fragments travel less and so are farther from the positive end. By looking at these DNA fragments, which are created by cutting DNA with restriction enzymes one can compare and contrast DNA. Thus DNA fingerprinting can take place based on the different restriction sites in DNA (cut by the enzymes) forming different length segments of DNA.

Answer 2

The charge of DNA does not directly affect DNA fingerprinting. DNA fingerprinting relies on variations in DNA sequences, not on its charge. The technique separates DNA fragments based on size and does not involve its charge.