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
A) paedomorphosis.
B) homochrony.
C) heterochrony.
D) Two of the responses above are correct.
Answer: D
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