Answer:
b.You measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same.
Step-by-step explanation:
You are given an experimental problem involving control of a geneʹs expression in the embryo of a particular species. One of your first questions is whether the geneʹs expression is controlled at the level of transcription or translation is you measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same.