Which developmental abnormality occurs when imaginal disc cells experience ectopic activation of homeotic genes?

💡 Explanation

When homeotic genes are ectopically activated in imaginal discs, positional information is disrupted because these genes specify segment identity, causing cells to adopt the fate of another segment, leading to a limb replacement. Therefore, antennal structures replace limbs rather than accelerated molting needing hormonal control, blocked apoptosis disturbing cell death, or reduced ommatidia numbers resulting from separate signalling pathway disruptions.

• Which developmental outcome from molting disruption impedes butterfly eclosion?
• Which outcome hinders nutrient intake when transpiration is excessively slowed?
• Which mechanism impairs avian flight during periods of prolonged heavy rainfall, increasing effective stall speed?
• Which developmental consequence occurs in an insect larva if the imaginal discs fail to correctly differentiate after molting?
• Which signaling malfunction during metamorphosis leads to malformed adult wings in insect imaginal discs?
• Which consequence results when a soaring bird's air sacs malfunction during thermalling?