1. The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization. 
   原核授精的核聚变之前的精子或卵子的单倍体核
2. The nucleus of an egg cell was removed and replaced with the nucleus from a cell of the animal to be cloned. 
   就是将卵细胞的细胞核去除，然后用预备克隆的动物的细胞核取而代之。
3. If a male totally lacks sperm or the testicular cells that make it, a nucleus from one of his body cells could be inserted into an egg from his mate that had had its nucleus removed. 
   如果一个男子完全没有精子或者没有制造精子的睾丸细胞，那么就可以从他的身体细胞中取一个细胞核放置到他的配偶的除去细胞核的卵子中。
4. male parthenogenesis in which the embryo contains only paternal chromosomes due to the failure of the egg nucleus to participate in fertilization. 
   由于卵子在受精过程中的失败而使胚胎只包含父染色体的一种单性生殖。
5. female parthenogenesis in which the embryo contains only maternal chromosomes due to the failure of the sperm to fuse with the egg nucleus. 
   由于在精子与卵子融合过程中发生失败而使胚胎只包含母染色体的一种单性生殖。

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• 1. 卵核
  鸡蛋宽面(条) egg nucleus...卵核 egg of oak silkworm...柞蚕卵 egg on
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