Enucleated egg . An egg cell from which the nucleus has been removed. This is usually accomplished by penetrating the cell with a fine glass needle and withdrawing the nucleus while observing the process under a microscope. Germ cell . The period of time it takes an embryo to develop in the uterus from a fertilized egg to a newborn offspring.
Gestation begins with implantation of the embryo in the uterus and ends with birth.
The structure within a cell that contains the genetic material or genes. The nucleus is surrounded by a membrane that separates it from the remainder of the cell. An egg cell. A female productive cell. Somatic cell .