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* An asexual form of reproduction found in females where growth and development of embryos occurs without fertilization by males.  
 
* An asexual form of reproduction found in females where growth and development of embryos occurs without fertilization by males.  
 
* 100% female contribution.  
 
* 100% female contribution.  
* Self-activated oocytes require no contribution from sperm.  
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* Self-activated [[The_Ovary_-_Oocytes_-_Anatomy_%26_Physiology|oocytes]] require no contribution from sperm.  
 
* The offspring produced by parthenogenesis almost always are female in species where the XY chromosome system determines gender.
 
* The offspring produced by parthenogenesis almost always are female in species where the XY chromosome system determines gender.
 
* Occurs in very few fish species.
 
* Occurs in very few fish species.
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