What is the correct order of gene expression in the early Drosophila embryo?
A)pair-rule genes,gap genes,segment polarity genes
B)gap genes,pair-rule genes,segment polarity genes
C)gap genes,segment polarity genes,pair-rule genes
D)segment polarity genes,pair-rule genes,gap genes

Question

Quizplus · Accepted Answer

In the early Drosophila embryo, gap genes are expressed first and divide the embryo into broad regions along the anterior-posterior axis. Then, pair-rule genes are expressed in alternating segments within those broad regions, refining the pattern further. Lastly, segment polarity genes establish the boundaries between individual segments by directing the formation of specific structures in each segment.

What Is the Correct Order of Gene Expression in the Early