单语范例（未经PONS编辑处理）
英语
- The role of the segment polarity genes is to define to boundaries and the polarity of the segments.en.wikipedia.org
- Segment polarity genes are expressed in the embryo following expression of the gap genes and pair-rule genes.en.wikipedia.org
- These transcription factors then regulate the expression of segment polarity genes, which define the polarity of each segment.en.wikipedia.org
- Unlike the gap and the pair-rule genes, the segment polarity genes function within cells rather than within the syncytium.en.wikipedia.org
- Also, the gap and pair-rule genes are expressed transiently while segment polarity gene expression is maintained throughout development.en.wikipedia.org
- The expression of the pair-rule genes translate into the expression of the segment polarity genes in 14 stripes.en.wikipedia.org
- Thus, segment polarity genes influence patterning though signaling rather than autonomously.en.wikipedia.org
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