Introduction The idea of cloning has been around for a while, but the thought of it becoming a reality is surprisingly new. Cloning has been all over the papers and the news lately, mostly caused by the death of possibly the world’s most famous animal behind Lassie, Ian Wilmut’s cloned sheep, Dolly. In 1880, a man named Walter Sutton made one of the most important discoveries towards cloning- he proved that chromosomes hold genetic information. This discovery allowed us to get to where we are in the world of cloning today. Research Facts Farmers started cloning plants thousands of years ago in simple ways, such as taking a cutting of a plant and letting it root to make another plant. Early farmers also devised breeding techniques to reproduce plants with such characteristics as faster growth, larger seeds, or sweeter fruits.
They combined these breeding techniques with cloning to produce many plants with desired traits. These early forms of cloning and breeding were slow and sometimes unpredictable. However, the scientific cloning history really began in 1902, when Hans Spemann divided a salamander embryo in two, showing that early embryo cells retain all the genetic information necessary to create a new organism. Later, Spemann also performed the first nuclear transfer experiment, and ten years later, the German scientist proposed a ‘fantastic experiment;’ to transfer one cell’s nucleus into an egg without a nucleus, the basic method that would eventually be used in cloning.
The Essay on Plant Cloning
Cloning is asexual reproduction. Cuttings are taken from a mother plant in vegatative growth, and rooted in hydroponic medium to be grown as a separate plant. The offspring will be plants that are identical to the parent plant. Cloning preserves the character of your favorite plant. Cloning can make an ocean of green out of a single plant, so it is a powerful tool for growing large crops, and will ...
Many years later, Neal First produced genetic copies of calves from embryos. They grew to about 120 cells. A year later, scientist Ian Wilmut copied First’s experiment with separate cells from sheep, but put the embryo cells into an inactive state before transferring their nuclei to sheep eggs. The eggs developed into normal lambs.
Wilmut’s cloned sheep, Dolly, was born a year later in 1996, but was not announced until 1997. Sadly, Dolly the sheep was put to sleep on February 14 th, 2003 after developing progressive lung disease. Anti-cloning critics argue that the science of cloning is in its infancy and, mistakes may be made along the way. This could result in the development of cloned animals or humans with serious defects. Others fear that cloning tampers with God’s will.
Supporters of human cloning argue that without proper regulation, cloning could result in such questionable practices as designing babies with chosen genetic qualities so that they are more athletic, beautiful, or intelligent. As a result of so much controversy, the future of cloning remains uncertain. Conclusion New areas of science often raise questions about safety. Early experiments in animal cloning attracted attention over its potential dangers. In some experiments in the early 1990 s, for example, cloned cows had bad immune systems. Other experiments created cloned mice that grew obese.
In some studies, cloned animals seemed to grow old faster and die younger than normal members of the species (E. G. Dolly).
Some people also believe that cloning is “playing God,” and should be banned. Many scientists argue that cloning could create cures for terminal illnesses and create excess organs for use in surgery.
Scientists have also planned to use cloning to help infertile couples have babies. In my opinion, I don’t think cloning is bad, and I don’t think that it should be banned. It would create countless new possibilities for cures and organ replacements.
The Essay on Cloning Cloned Sheep
... experiments and researches. Also, I tried to find an answer to popular question about cloning a human being. Sheep Dolly was the first cloned ... on. New discoveries in genetic al cloning are very important for plants too. Cloning helped to create various hybrids, such as nectarines. ... day fetal and 6-year old mammary gland. I would like to briefly explain how the experiment of cloning Dolly was made. ...
Bibliography:
web 761567589/Cloning. html.
