Which outcome results when juvenile hormone is persistently elevated during Drosophila pupation?

💡 Explanation

Persistently elevated juvenile hormone (JH) triggers developmental arrest because JH normally needs to be absent for the complete pupal-to-adult transition, ensuring adult structures develop. Therefore, arrested development and larval-pupal intermediates results, rather than accelerated metamorphosis or body plan disruption arising from defects in ecdysone signalling or gap gene expression.

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