a scientists wants to make a DNA fingerprint, and she has used polymerase chain reaction (PCR) what should her next step be?

She should use a black light to get the finger pint on it that

Gel electrophoresis

Explanation:

PCR, that is, polymerase chain reactions amplifies the small amount of sample DNA into the multiple copies. These DNA fragments are then subjected to gel electrophoresis, a technique that uses the electric field and separates the DNA fragments based on their size. These separated DNA fragments are then visualized using autoradiography.