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Human cloning is the creation of a genetically identical copy of a human. The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and tissue. It does not refer to the natural conception and delivery of identical twins. The possibilities of human cloning have raised controversies.
In the field of biotechnology, cloning is the process of creating cloned organisms of cells and of DNA fragments. The artificial cloning of organisms, sometimes known as reproductive cloning, is often accomplished via somatic-cell nuclear transfer (SCNT), a cloning method in which a viable embryo is created from a somatic cell and an egg cell.
Cloning has been used by scientists since the 1950s. [5] One of the most well known clones is Dolly the sheep. Dolly was born in the mid 1990s and lived normally until the abrupt midlife onset of health complications resembling premature aging, that led to her death. [5] Other known cloned animal species include domestic cats, dogs, pigs, and ...
In bioethics, the ethics of cloning concerns the ethical positions on the practice and possibilities of cloning, especially of humans. While many of these views are religious in origin, some of the questions raised are faced by secular perspectives as well. Perspectives on human cloning are theoretical, as human therapeutic and reproductive ...
Reproductive technology. Reproductive technology encompasses all current and anticipated uses of technology in human and animal reproduction, including assisted reproductive technology (ART), [1] contraception and others. It is also termed Assisted Reproductive Technology, where it entails an array of appliances and procedures that enable the ...
In genetics and developmental biology, somatic cell nuclear transfer (SCNT) is a laboratory strategy for creating a viable embryo from a body cell and an egg cell. The technique consists of taking a denucleated oocyte (egg cell) and implanting a donor nucleus from a somatic (body) cell. It is used in both therapeutic and reproductive cloning.
Nuclear transfer is a form of cloning. The step involves removing the DNA from an oocyte (unfertilised egg), and injecting the nucleus which contains the DNA to be cloned. In rare instances, the newly constructed cell will divide normally, replicating the new DNA while remaining in a pluripotent state. If the cloned cells are placed in the ...
Human cloning. Pre-selecting or increasing the probability that an embryo will be a particular sex (except to prevent a sex-linked genetic condition). Transplanting a sperm, egg, embryo or foetus of a non-human life form into a human being, or using a sperm, egg, or in vitro embryo that was transplanted into a non-human life form to create a ...