Which Segment Gene is Activated First in the Drosophila Embryo

Question

Which segment gene is activated first in the Drosophila embryo?
A) pair-rule genes
B) segment-polarity genes
C) gap genes
D) myogenic bHLH genes

Accepted Answer

Gap genes are the first genes to be activated in the segmentation process of Drosophila embryo. They are responsible for dividing the embryo into large regions or "gaps," which will later differentiate into individual segments.