The Role Of Dna In Cloning

833 words - 3 pages

Have you ever thought that science can advance rapidly to a great extent? Nowadays scientists are trying to make the same exact copy of your DNA. Can you imagine having a clone of yourself, your parents, or even your siblings? Have you ever wished for someone to take your place for a minute, an hour, or a day? This may come true one day. According to the Online Dictionary; a clone is defined as “a cell, cell product, or organism that is genetically identical to the unit or individual from which it was derived.” I always thought that cloning was impossible, and is just science fiction.
The process of cloning is the creation of genetically identical copies of a biological unit. This means that every single part of the DNA is identical. The natural way of a clone is identical twins. In nature, twins occur just after fertilization of an egg cell by a sperm cell. Then when the fertilized egg, a zygote, tries to divide into a two-celled embryo, the two cells separate. Each cell continues dividing on its own, eventually developing into a separate individual within the mother. Another natural way of cloning is when single celled organisms, for example bacteria, produce genetically identical offspring. This process is called asexual reproduction. Asexual reproduction is the formation of new individuals from the cells of a single parent. Cloning is accomplished without the contribution of two gametes; therefore it is an asexual reproduction.
There are three different types of artificial cloning, molecular cloning, reproductive cloning and therapeutic cloning. Molecular cloning, which is also gene cloning, produces identical copies of genes or DNA. Reproductive cloning produces copies of whole animals. Therapeutic cloning is the transplantation of a patient's DNA into an unfertilized egg in order to grow stem cells that could cure devastating diseases. Therapeutic cloning is for saving lives from deadly diseases. As Wikipedia states, “The ultimate goal of Therapeutic Cloning is to one day use those harvested stem cells to serve as replacement cells to treat heart disease, Alzheimer's, cancer, and other diseases.”
Scientists have been cloning animals for many years now. The only difference between the current and past cloning is the technology that scientists have available nowadays. The more technology the better, the more advanced and successful the experiment. The first animal...

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