Final answer:
The correct answer is option d) Germany.
Step-by-step explanation:
The "mouse-fly" Hox gene experiment in 1995, which is part of groundbreaking research into developmental biology, was performed by a team of researchers in Germany. This experiment emphasized the remarkable conservation of Hox genes among different species, such as mice and flies, that have a common evolutionary ancestor.
Discovering the function of these genes has significant implications for understanding how diverse life forms have evolved to have different body plans despite having an identical set of genes.