Cell-to-cell communication that leads to cell fate determination, particularly as occurs during development.
Signal induction thus is extracellular communication that occurs during embryogenesis, morphogenesis and organogenesis, and particularly as involves chemical gradients along with cell-to-cell recognition. The result change in cell gene expression gives rise to cellular differentiation.
Signal induction is preceded by cytoplasmic determinants found within the zygote, that is, intracellular chemical gradients (cytoplasmic determinants) precede, during development, the formation of extracellular chemical gradients that give rise to signal induction.
Note that signal induction is not to be confused with signal transduction, though the two processes are not all together dissimilar.
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