Match each of the following categories of Drosophila developmental genes with the correct descriptions of their expression patterns. Dragged and dropped options on the right-hand side will be automatically saved. For keyboard navigation... SHOW MORE ✓ Segment polarity genes Maternal-effect (coordinate) genes Pair-rule genes Gap genes Homeotic genes ||| ||| = III = ||| ||| Establish broad regions in the embryo. Alternating bands of expression define parasegments. Establish initial anterior-to-posterior gradient. Define anterior vs. posterior portions of each segment. Establish which organs or appendages develop in each segment.

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