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.
A portion of the clone's genetic material is derived from the mitochondria in the egg in which it developed. This gives way to certain mutations and shortens life spans and produces other defects. Therapeutic cloning can be described as the creation of human embryos which are used for the purpose of research.