The different methods of cloning and the issues surrounding it

The hope is that these cells can help scientists understand genetic disease mechanisms and create stem cell-based therapies for diseases and injuries that are genetically matched to individual patients. Parthenogenesis[ edit ] Clonal derivation exists in nature in some animal species and is referred to as parthenogenesis reproduction of an organism by itself without a mate.

history of cloning

Human embryonic stem cells. Cloning stem cells[ edit ] Main article: Somatic-cell nuclear transfer Somatic-cell nuclear transferknown as SCNT, can also be used to create embryos for research or therapeutic purposes.

At each stage in his life, the achievements of his deceased sibling are held up to him as reminders of his parents' hopes for him. Inbovine cloning was conducted from embryonic cells of another cow.

Soon after, three African wildcats were cloned using frozen embryos as a source of DNA. Most cloned animals die during gestation and, because of abnormal placentas or abnormally large fetuses, can kill the surrogate mother.

Medical texts describe embryonic development as a gradual process, beginning when the blastocyst attaches to the uterus and ending eight weeks later, as the organs begin to form. Healthier animals means better food.

Nature Cell Biology Sep, 3 Biol Sci Columbia Univ Spring.

human cloning

In this process, three actions should be done: i Enucleation of cell, ii Placing it into the enucleated oocyte, and iii Simulating the oocyte by chemical or electrical current to start cell division.

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Frequently Asked Questions about Animal Cloning