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 sperm cell is the male sex cell. All animals (and many other types of organisms) produce what are called sex cells. Sex cells, are the cells, that when combined, produce a completely new organism. For example, your mother and every other human female, carry egg cells (female sex cells) in their ovaries.perm, short for spermatozoon, is the male sex cell and, like the female egg cell, carries half of the DNA, or biological information, necessary to determine not only the type of organism, but also its characteristics. When the sperm cell and egg cell unite, an embryo is formed.