The developmental control pathway that results in polarity and pattern formation in the head-abdomen axis in Drosophila
A) has a similar gene sequence and chromosome order in the mouse.
B) arose only in insects during evolution.
C) determines only the organs that arise in head segments.
D) involves only gene products made by the embryo.
E) arose through new genes that had not existed before in any form.

Question

Quizplus · Accepted Answer

The developmental control pathway that results in polarity and pattern formation in the head-abdomen axis in Drosophila has a similar gene sequence and chromosome order in the mouse. This suggests that this pathway arose early in evolution and has been conserved in many different animal species.

The Developmental Control Pathway That Results in Polarity and Pattern