During genetic engineering DNA fragments are produced by cutting DNA with endonucleases. These fragments are further used for Producing recombinant DNA. Explain the technique and principle that help to sepa-rate these DNA fragments .

Explanation

The fragments can be separated by a technique known as gel electro-phoresis . Since DNA fragments are negatively charged molecules they can be separated by forcing them to move towards the anode under an electric field through a medium . A natural polymer called agarose is commonly used as the medium . The fragments separate according to their size. The smaller fragments move farther .