WJZ Up To The Minute January 31, 2013
The crucial bit are these chains which encircle the rod, one, and here is a second and entwine. This is the double helix. An extraordinary feat of intellectual deduction, and it led to a whole new branch of science molecular genetics. More recently, dna has given us new insights into the family relationships of animals using a technique called dna fingerprinting. It was developed by sir Alec Jeffreys of Leicester University in 1984, and using just a simple smear of blood, its possible not only to identify one particular individual, but to establish whether or not its closely related to another...
Source: archive.org
