Larval flies (maggots)express the Ubx gene in all of their segments, and thereby lack appendages. If this same gene continued to be expressed throughout subsequent developmental stages, except in the head region, and if the result was a fit, sexually mature organism that still strongly resembled a maggot, this would be an example of

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Quizplus · Accepted Answer

Paedomorphosis and heterochrony both apply here. Paedomorphosis refers to the retention of juvenile features in the adult organism, which fits the description of an adult resembling a maggot. Heterochrony refers to changes in the timing of developmental events, which is implied by the altered expression of the Ubx gene beyond its usual developmental stage.

Larval Flies (Maggots)express the Ubx Gene in All of Their