Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
Meiosis, Germ Cells, and Fertilization
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Oogenesis<br />
Eggs Develop in Stages<br />
• differentiates into a mature egg (or ovum)<br />
• Primordial germ cells migrate to the forming gonad to become oogonia<br />
• proliferate by mitosis for a period before beginning meiosis I, at which point<br />
they are called primary oocytes.<br />
• oocytes arrest for a prolonged period in meiosis I<br />
• after completing meiosis I, they arrest again in metaphase II while awaiting<br />
fertilization
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