What technique do forensic scientists use to make more DNA?

Explanation:

Rather than use X-ray-based gel electrophoresis, today's forensic scientists measure the size of DNA fragments with a technique called capillary electrophoresis. Small fragments travel more quickly than large fragments through a gel-like material.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.