This is my life…. I am an Oocyte (EGG) Cell!
In research and development, the oocytes and embryos of Xenopus Laevis are widely used as model systems as their handling and manipulation is easily achieved. Oocytes are tetraploid cells (having four sets of chromosomes) located within the ovarian lobe of adult female frogs and are surrounded by a layer of follicle cells. The large nucleus within the oocyte is called a germinal vesicle and contains genetic information and mitochondrial DNA.
It is the largest single cell in the body (filling up the ovarian volume) and has many similar structures to that of a somatic cell. Oocytes have two poles, the animal pole and the vegital pole. There are permeable to small molecues but when fertiliztion does not occur, they convert to impermeable molecules.
The oocyte is an active site for mRNA and protein snythesis as they provide an important expression system used extensively in molecular biology. They play a massive role in reproduction of the Xenopus Laevis species, together with the sperm of their male counterparts. Their fate, upon fertilization is to grow and develop into a full functioning organism, therefore providing a continuation of their respective species.