2018年1月24日 · On July 5, 1996, the most famous individual sheep in history was born: Dolly, the first mammal cloned from an adult cell. Scientists had cloned frogs previously, but many considered using an adult mammalian cell to produce a …

As recently as the year 2000, it seemed almost inevitable that rogue scientists would start human cloning any day. Dolly the sheep, the first mammal to be cloned from an adult cell, was born in 1997. A council on bioethics called by then-President Bush, and an emergency report by the National Academies, both published reports deeming that the ...

2021年8月3日 · A child produced by cloning would be the genetic duplicate of an existing person. If you cloned yourself, the resulting child would be neither your son or daughter nor your twin brother or sister, but a new category of human being: your clone. The great majority of people have an intuitive sense that human beings should not be cloned.

2010年3月10日 · A: Any effort to create a cloned human being would constitute an unacceptable form of human experimentation. If reproductive cloning ever became technically successful, and an accepted practice, it would be much more difficult to prevent other pernicious applications of human genetic engineering technology.

2016年8月4日 · "People were worried that cloning would be used as a means to harvest organs or to replace people that had died," says Lawrence Brody, director for the Division of Genomics and Society at the National Institutes of Health. Those opposed to human cloning even today fear narcissists would employ the procedure...

Reproductive Cloning Many countries have passed legislation banning human reproductive cloning, including Australia, Austria, Argentina, Belgium, Brazil, Canada, the ...

Since Dolly’s birth in 1996, scientists have cloned nearly two dozen kinds of mammals, including dogs, cats, pigs, cows and polo ponies, and have also created human embryos with this method. But until now, they have been unable to make babies this way in primates, the category that includes monkeys, apes and people.

2006年6月30日 · Reasons for Concern about Research Cloning 1. Perfection of techniques to create clonal human embryos would make it more difficult to prevent the births of human clones. If clonal embryos free of reprogramming errors can be created, establishing pregnancies is likely to be a trivial procedure. Without a system of strict public oversight and control, some of the clonal embryos created in ...

2006年6月30日 · Q: Why are some people who support embryonic stem cell research concerned about research cloning? A: There are three main reasons for concern. First, efforts to produce cloned human embryos require large numbers of women's eggs. In order to retrieve eggs, researchers give women hormonal treatments to first "shut down" and then "hyper-stimulate ...

2010年3月10日 · Reproductive cloning means creating a genetic duplicate of an existing organism. A human clone would be a genetic duplicate of an existing person. Genes are strings of chemicals that help create the proteins that make up your body. Genes are found in long coiled chains called chromosomes. They are located in the nuclei of the cells in your body.