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| Description: After fertilization (at about 24 hours), the zygote begins mitotic division called cleavage. The first division takes about 6 hours. Successive divisions take less time. Picture Stats: Views: 193 Filesize: 377.08kB Height: 371 Width: 1276 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40475 |