See Also: pair rule gene(medicine)
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pair rule gene (medicine)


pair rule gene
<molecular biology> A segmentation gene, expressed sequentially between gap genes and segment polarity genes. In development of Drosophila, a set of about 8 genes that are expressed only in alternate segments (odd or even) of the developing embryo. Loss of function mutants thus lack alternate segments.

Examples: even skipped (eve), fushi tarazu (ftz), hairy.