A form of cloning known as _______ occurs when a zygote is produced through in vitro fertilization and, when it consists of two to four identical cells, it is separated to grow into discrete but genetically identical organisms.

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Twinning refers to the process where a zygote, initially created through in vitro fertilization, is divided when it consists of two to four cells. Each of these cells can then grow into separate, genetically identical organisms, mimicking the natural process that leads to the birth of identical twins.

A Form of Cloning Known as _______ Occurs When a Zygote