Which developmental outcome arises when imaginal discs in a fruit fly larva misinterpret positional information?

💡 Explanation

When imaginal discs misinterpret positional information, pattern formation genes are incorrectly activated because signalling pathways controlling anterior-posterior and dorsal-ventral axes are disrupted, leading to segmentation defects. Therefore duplicated or missing segments occur, rather than premature inhibition, delayed molting, or increased metabolic rate, which involve different endocrine or metabolic controls.

• Which outcome occurs when a migratory bird encounters localized reversal of Earth's polarity?
• Which effect occurs in avian respiratory systems when air sac walls become inflamed?
• Which outcome directly limits long-duration high-altitude avian flight when air sacs cannot fully inflate?
• Which developmental failure arises when suppression of imaginal discs is prematurely disrupted during early larval stages?
• Which outcome occurs when countercurrent exchange fails in fish gills exposed to acidification?
• Which signal enhancement occurs when flashlight fish aggregate?