Cloning

9 Pages 2146 Words

ne cell's nucleus into an egg without a nucleus, the basic method that would eventually be used in cloning. Fourteen years later in 1952 Briggs and King clone tadpoles. Another scientist John Gurdon clones frogs from differentiated cells in 1962. In 1969 Shapiero and Beckwith isolate the first gene. By 1973 Cohen and Boyer create first recombinant DNA organisms. 1978, the release of David Rorvik's book, In His Image: The Cloning of a man sparks a worldwide debate on cloning ethics. 1984 Steen Willadsen, a Danish scientist, reports he has made a genetic copy of a lamb from early sheep embryo cells, a process now called "twinning." Other scientists will eventually use his method to "twin" cattle, pigs, goats, rabbits and rhesus monkeys. 1995 Ian Wilmut replicates First's experiment with differentiated cells from sheep, but puts embryo cells into an inactive state before transferring their nuclei to sheep eggs. The eggs develop into normal lambs. In February 1997 Wilmut and colleagues at the Roslin Institute in Scotland report they have cloned a 6-year-old adult sheep from an udder cell. They name the sheep Dolly (after Dolly Parton). It is the first clone created from an adult cell. (4)
Although, many believe cloning to be beneficial to mankind, just like with any new discovery cloning has become a widely debated controversial topic. In 1978 the release of David Rorvik's book, In His Image: The Cloning of a Man, sparks a worldwide debate on cloning ethics. (4) Many would argue that cloning has tremendous positive aspects and would only better our way of life. While other groups such as naturalists and religious followers, strongly disagree. Those who support cloning feel that cloning could bring our understanding of evolution and human past to a new heightened level of understanding. Cloning would also allow for organ transplant without a waiting list. “Therapeutic cloning [specific cloning technique] and embryonic stem cell rese...