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| Description: The haploid nucleus in the head of the sperm becomes the male pronucleus. The haploid nucleus of the fertilized ovum becomes the female pronucleus. When the two merge (syngamy), the diploid zygote is formed. Picture Stats: Views: 206 Filesize: 811.23kB Height: 1000 Width: 778 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40473 |