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segmentation nucleus |
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segmentation nucleus,
the nucleus that results from the fusion of male and female pronuclei in a fertilized ovum. Its formation is the final stage in fertilization and initiates the first cleavage of the zygote. Also called cleavage nucleus. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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