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.
The cells that combine are called sex cells Female â egg Male â sperm Fertilization: an egg cell and a sperm cell join together A new cell is formed and is called a zygote. Sexual Reproduction. A type of reproduction in which the genetic materials from two different cells combine, producing an offspring. The cells that combine are called. sex cells. Female. â egg. Male. â sperm. Fertilization. : an egg cell and a sperm cell join together.