| 单词 | polar body, polar nucleus |
| 释义 | polar body, polar nucleuspolar body, polar nucleusorpolocytea small haploid cell, produced during OOGENESIS in female animals, that does not develop into a functional OVUM. During such GAMETOGENESIS, two (or sometimes three) polar bodies are produced, along with one large ovum. A similar situation arises in the development of the egg cell of higher plants, where only one fertile gamete is produced from MEIOSIS. see EMBRYO SAC. |
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