Monday, October 22, 2007

Brief history about cloning

The first cloned organism was created by Hans Dreisch n the late 1800’s and the abjective was to prove that genetic organism is not losing cell division, not to create a clone. Meanwhile, in 1902, another scientist calls Hans Spemman, he found out that he will be able to shown that there are no genetic material was lost as cells grew and divided in his experiment to develop salamander embryos into adult salamander. The first experiment on producing a genetically copy by nuclear transfer was done In year 1952 on frogs by a team of scientist in Philadelphia. In 1977, the firast cloned organism from embryo was created by a German scientist successfully. After that, the first cloned mammal, a mice, had been successfully cloned in 1986 and the experiment was carried on by transfer the nuclear from embryonic cells. In 1996, a sheep name Dolly had been successfully cloned by Scottish scientists as Roslin institute. It was the greatest breakthrough in science and cloning technology. October 3, 1997, the Honolulu Technique created Cumulina, the cloned mouse. She was cloned from cumulus cells that surround developing eggs cells using traditional nuclear transfer. The scientists repeated the process for many years, yielding over fifty mice that are virtually identical by the end of July, 1998. The Honolulu Technique’s success rate of 50:1 is almost six times better than Roslin institute’s success rate. 277:1. As cloning technique improves, more and more applications will be seen in everyday life.

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