Pub. date: 2006 | Online Pub. Date: September 15, 2007 | DOI: 10.4135/9781412952453 | Print ISBN: 9780761930297 | Online ISBN: 9781412952453| Publisher:SAGE Publications, Inc.About this encyclopedia
Abraham D. Lavender
Recombinant DNA, also written as rDNA, is the combining of genes from two or more organisms. The procedure is to construct a DNA molecule in vitro and then insert it into a host cell or organism. The product of the procedure usually is defined as being genetically engineered , although the two terms genetically modified or transgenic are also used. Recombinant DNA is one of three types of cloning and often is mistakenly identified with one of the other two types: reproductive cloning and therapeutic cloning, although there is overlap. Reproductive cloning ( cloning is from the Greek word for twig) has been used for plants since ancient times, as a twig from a plant would be put in the ground and grow. But the first cloned animal, a tad-pole, did not occur until 1952. Much popular attention has been given to reproductive cloning, largely since the cloning of The ...