What would be the consequences of there being no mrna being transcribed from dna?

Since mRNA codes for the protein during translation, the cell would likely stop producing proteins. 

(c) is the correct option

Explanation:

The given type of change is illustrative of a change in a developmental gene or its regulation that altered the spatial organization of body parts

Hox genes encode conserved homeodomain transcription factors that possess significant developmental power in shaping animal morphologyHox genes are also expressed in the nervous system of Drosophila and have a wide array of functions in the development of the peripheral and central nervous system (CNS)In the peripheral nervous system of Drosophila, Hox genes are required for sensory organ development as well as for proper formation of neuromuscular networksDuring embryogenesis of the CNS, Hox genes are involved in the establishment of regional neuronal identity, in fate specification in different segments, in regionalized programmed cell death of post mitotic neurons, and in the control of neural proliferationDuring post-embryonic development of the CNS, Hox genes are involved in limiting the proliferative potential of neuralHox genes and their cofactors are also subject to cross-regulatory interactions in neural patterning