Indicating the name and respective ploidy of each involved cell how can the formation of egg cells from germ cells be described?
The formation of egg cells starts with a germ cell called oogonium (2n) that undergoes mitosis and gives birth to the oocyte I (2n). The oocyte I undergo meiosis I that however is interrupted at prophase. After puberty during every menstrual cycle an oocyte I finishes the meiosis I and obtain one oocyte II (n) and the first polar body (n). With fecundation the oocyte II then undergoes meiosis II and creates the mature egg cell (n) and the second polar body (n).