Final answer:
An oogonium divides by mitosis to produce another oogonium and a primary oocyte, which upon maturity becomes a secondary oocyte that upon fertilization can lead to an ovum.
Step-by-step explanation:
The formation of a secondary oocyte starts with the division of an oogonium through the process of mitosis. This creates another oogonium and a primary oocyte. The primary oocyte then undergoes the first meiotic division but is arrested in prophase until puberty. Upon maturation, triggered by hormones, the primary oocyte completes the first meiotic division resulting in unequal division of cytoplasm and the formation of a large cell known as the secondary oocyte and a smaller cell called a polar body, which typically degenerates. If the secondary oocyte is fertilized, it will complete meiosis II, leading to the creation of an ovum and another polar body.
Oogonia divide by mitosis to produce another oogonia and a daughter cell. The process of oogonia dividing by mitosis to form primary oocytes, which then undergo meiosis to produce secondary oocytes, is known as oogenesis. The division of oogonia by mitosis is an important step in the development of eggs in the ovaries of female organisms.