| Term: | blastomere pronucleus |
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| Note: | This page represents a term created by the combination ("post-composition") of two ontology terms. For more information on the individual terms, click the hyperlinked name. |
| Name: | blastomere |
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| Synonyms: | blastomeres |
| Definition: | Cell that arises during cleavage and is partially cleaved, and located at the blastodisc margin prior to collectively forming the yolk syncytial layer (YSL) in the midblastula. |
| Ontology: | Anatomy Ontology [ZFA:0000093] |
| Name: | pronucleus |
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| Synonyms: | |
| Definition: | The nucleus of either the ovum or the spermatozoon following fertilization. Thus, in the fertilized ovum, there are two pronuclei, one originating from the ovum, the other from the spermatozoon that brought about fertilization; they approach each other, but do not fuse until just before the first cleavage, when each pronucleus loses its membrane to release its contents. |
| Ontology: | GO: Cellular Component [GO:0045120] QuickGO AmiGO |