Clonign paper #2 - Nicholas Christie ISB Lab 2/22/08...

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Nicholas Christie ISB Lab 2/22/08 Cloning is a DNA sequence, such as a gene, that is transferred from one organism to another and replicated by genetic engineering techniques. ( Dictionary.com) Dolly was a sheep and she was the 277 th attempt when trying to produce a clone of her. When trying to produce Dolly, the scientists used the nucleus of a cell from a six-year-old Finn Dorset white sheep; the nucleus contained nearly all of the cells genes. Then they injected the cell into an unfertilized egg cell which had its nucleus removed, and made the cells fuse by using electrical pulses. The unfertilized egg cell came from a Scottish Blackface ewe. From 277 cell fusions, 29 early embryos developed and were implanted into 13 mothers. But only one pregnancy went to full term, and the Finn Dorset lamb (Alias Dolly) was born after 148 days .( News Science 1998 ) Cloning is being used all over the world to try and find out how to preserve life in any form possible. Cloning started in 1952 and was first preformed on a tadpole. Sheep, goats, cows, mice, pigs, cats, rabbits, and a gaur were all cloned before the creation of cloning and attempts at cloning certain species such as monkeys, chickens, horses, and dogs have been unsuccessful. Dolly Lived in the Roslin Institute and was probably the most famous sheep in the world. Dolly mated and produced normal offspring in the normal way showing that cloned animals can reproduce and give life to multiple offspring’s. Most sheep have an expected life span of 11 or 12 years but Dolly surfed from arthritis in the hind leg and died at the age of six on February 14, 2003. When cloning more than 90% of cloning attempts fail to produce offspring. Research shows that cloned animals tend to have more compromised immune function and higher rates of infection, tumor, growth, and other disorders. (Sgaramella 1998) DNA cloning, Reproductive cloning and Therapeutic cloning are the three types of
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Clonign paper #2 - Nicholas Christie ISB Lab 2/22/08...

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