The Pax6 gene codes for a transcription factor that initiates differentiation of cells that ultimately form the eye. Suppose that a researcher added an activator for the Pax6 gene to embryonic cells that are in the process of forming legs in Drosophila. What do you think the researcher will observe?
A) Legs and eyes will develop normally.
B) Legs will develop where the eyes normally develop.
C) Eyes will develop where the legs normally develop.

Question

Quizplus · Accepted Answer

The addition of an activator for the Pax6 gene will lead to the initiation of differentiation of cells that ultimately form the eye, even though these cells are in the process of forming legs. Therefore, eyes will develop where the legs normally develop.

The Pax6 Gene Codes for a Transcription Factor That Initiates