After amplification, the resulting DNA fragments are pushed through a clear gel that acts as a sieve and separates molecules by their size. This gel has been poured between two clear pieces of glass so that a laser beam can constantly scan across it.
Lab Tour
After amplification, the resulting DNA fragments are pushed through a clear gel that acts as a sieve and separates molecules by their size. This gel has been poured between two clear pieces of glass so that a laser beam can constantly scan across it. 
