| Name: | oocyte | 
|---|---|
| Synonyms: | egg | 
| Definition: | A female germ cell that has entered meiosis. | 
| Ontology: | Anatomy Ontology [ZFA:0001109] | 
| Name: | fertilization | 
|---|---|
| Synonyms: | syngamy | 
| Definition: | The union of gametes of opposite sexes during the process of sexual reproduction to form a zygote. It involves the fusion of the gametic nuclei (karyogamy) and cytoplasm (plasmogamy). | 
| Ontology: | GO: Biological Process [GO:0009566] QuickGO AmiGO |