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← Nature & AnimalsWhich disruption impairs wing development when imaginal discs fail to express the apterous gene?
A)Asymmetric vein patterning occurs
B)Compartment boundary formation ceases
C)Anterior-posterior axis is misaligned
D)Dorsoventral signaling is disrupted✓
💡 Explanation
When apterous isn't expressed, dorsoventral boundary formation fails because it regulates fringe expression, leading to non-localized Notch activation which specifies dorsal fate. Therefore disrupted dorsoventral signaling results, rather than asymmetric vein patterning, cessation of compartment boundary formation, or axis misalignment, which are governed by independent genetic pathways.
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