Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Arguments for and Against Development of Genetic Finger Printing.
Member rating: No Rating | Words: | Submitted: Fri Jan 30 2004
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
Arguments for and Against Development of Genetic Finger Printing The fingerprinting process uses enzymes to cut out specific sequences of DNA. The DNA is arrange in length order and labelled with a radioactive marker. These emit x-rays, when the sample is photographed the markers can be seen. This produces the 'fingerprint' - a series of black lines corresponding to the DNA sequences present. Initially the DNA is removed from the sample cells by chemical methods, and the two strands of the double helix are separated. Restriction enzymes are then added. These identify a particular sequence and cut it away. This produces a mixture of free lengths of DNA. The next stage is to sort these sequences into length order. This is done using agarose gel electrophoresis. DNA is a charged molecule, so in an applied electric field it moves towards an electrode. The agarose gel slows down the larger molecules,...
To see the full version of this document, and 144,847 others
