Editing Germ cell (section)

==Gametogenesis==
[[Gametogenesis]], the development of [[diploid]] germ cells into either [[haploid]] eggs or sperm (respectively oogenesis and spermatogenesis) is different for each [[species]] but the general stages are similar. [[Oogenesis]] and [[spermatogenesis]] have many features in common, they both involve:
* [[Meiosis]]
* Extensive [[morphology (biology)|morphological]] differentiation
* Incapacity of surviving for very long if fertilization does not occur

Despite their homologies they also have major differences:{{citation needed|date=December 2011}}
* Spermatogenesis has equivalent meiotic divisions resulting in four equivalent [[spermatid]]s while oogenic meiosis is [[asymmetrical]]: only one egg is formed together with a first and second [[polar bodies]].
* Different timing of maturation: oogenic meiosis is interrupted at one or more stages (for a long time) while spermatogenic meiosis is rapid and uninterrupted.