Because of the fission process that consumes the fuels, the old fuel rods must be changed periodically to fresh ones (this period is called a cycle). However, only a part of the assemblies (typically one-third) are removed since the fuel depletion is not spatially uniform.
In fertilization, the sperm and egg both contain one set of chromosomes. the father (sperm) and one from the mother (egg). In SCNT, the egg cell's single set of chromosomes is removed. chromosomes. come from the somatic cell.
Reproductive cloning occurs when a copy of another human being is created through SCNT, allowed to grow up to 14 days in a petri dish, and then transplanted into a womb to grow until birth. 1  Reproductive cloning has been used to create Dolly the Sheep and many cloned cows, dogs, cats and horses.