If a mutation in a homeotic gene produced the following phenotypes, would you expect the mutation to

Question:

If a mutation in a homeotic gene produced the following phenotypes, would you expect the mutation to be a loss-of-function or a gain-of-function allele? Explain your answer.
A. An abdominal segment has antennae attached to it.
B. The most anterior abdominal segment resembles the most posterior thoracic segment.
C. The most anterior thoracic segment resembles the most posterior abdominal segment.