Researchers from the laboratory headed by Hall and Kay have determined that fruit flies (Drosophila) have a multitude of independent biological clocks located throughout their bodies. They accomplished this by
A) being able to tell when the period (per) gene was turned on.
B) genetically engineering fruit flies to contain the firefly luciferase gene.
C) observing the molecular activity of important clock genes in a single, living, intact fly.
D) all of the above.

Question

Quizplus · Accepted Answer

The correct answer is D because the researchers were able to determine the presence of multiple biological clocks in fruit flies by employing a combination of techniques: identifying when the period (per) gene was activated, genetically modifying fruit flies to contain the firefly luciferase gene, and observing the molecular activity of crucial clock genes in a single, living, intact fly. These approaches together allowed them to make their discovery.

Researchers from the Laboratory Headed by Hall and Kay Have