AP BIOLOGY

Detailed explanation-1: -Using an electric field, molecules (such as DNA) can be made to move through a gel made of agarose or polyacrylamide. The electric field consists of a negative charge at one end which pushes the molecules through the gel, and a positive charge at the other end that pulls the molecules through the gel.

Detailed explanation-2: -DNA fragments smaller than 100 bp are more effectively separated using polyacrylamide gel electrophoresis.

Detailed explanation-3: -The techniques that are applied in identity testing are DNA fingerprinting, DNA profiling, and DNA typing. Although there are some technical differences between these tests, the terms have been used interchangeably.