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  • cleavage
  • By artificially slowing cleavage cycles in zebrafish embryos, I demonstrate that increases in transcriptional activity are independent of cell cycle elongation and embryo age. (upenn.edu)
  • initiates
  • After a constant, organism-specific number of cleavages, many metazoan embryos undergo the mid-blastula transition (MBT), which initiates extensive cell cycle remodeling. (upenn.edu)