Second phase of segment polarity gene expression: cell to cell signaling The regulation of the segment polarity genes by the pair-rule genes is only the first stage of regulation.
(cell to cell; signaling; The regulation of the segment polarity genes by the pair-rule genes) (Second phase of segment polarity gene expression; is; only the first stage of regulation)
cell to cell Second phase of segment polarity gene expression
signaling is
The regulation of the segment polarity genes by the pair-rule genes
only the first stage of regulation