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克隆

So with cloning one of those cells is used and then the cell is simply placed in to the egg cell of the carrier. In the sheep example, the carrier was a female sheep. For Dolly, a single cell was used from the udder of her mother. The DNA in her mother's cell was removed and then transferred to an egg cell of another sheep. About five months later Dolly was born without a father and a copy or clone of her mother.

因此克隆就是将亲本的体细胞中的一个植入载体的卵细胞中。利用多莉母亲的乳房的一个细胞，将该细胞的DNA移植到另一只羊的卵细胞。大约五个月后，没有父亲的多莉出生，与其母亲完全一致，是其母的克隆。

Though no humans have ever been fully cloned, human embryos have been cloned. Currently it may not be taking place, but in the future it may happen, but today it is rare. In the movies about Jurassic Park, cloning took place to create the dinosaurs, though it was a fictional movie, much of the science behind the process can be real.

虽然没有完全的克隆人，但曾有克隆的人类胚胎。克隆人目前难以实现，但将来却可能成真，但至今仍然罕见。侏罗纪公园的电影中，克隆用于创造恐龙，虽然这是一个虚构的电影，该过程后的科学大多是真实的。

Though there are fully developed human clones, other fully developed animals have been cloned besides sheep. They include the rhesus monkey, pig, cattle, cat, rabbit, deer, horse, a few others, and of course mice. Cloning also involves many, many failed attempts before it becomes successful. For instance, Dolly the sheep was not born until after 276 failed attempts. The only true successful cloning takes place when identical twins are born, but they came from a father and a mother. The cloned animals may also experience health problems.