In combination, what do the products of gap genes, pair- rule genes, and segmentation polarity genes of fruit flies do?
A) They direct cell movements during differentiation.
B) They trigger the reorganization of the larval body into an adult body.
C) They define the segmented body plan of the embryo.
D) They set up the back- to- belly axis of the larval body.

Question

Quizplus · Accepted Answer

The products of gap genes, pair-rule genes, and segmentation polarity genes work together to define the segmented body plan of the fruit fly embryo. Gap genes create broad regions along the anterior-posterior axis, pair-rule genes divide those into segments, and segmentation polarity genes further refine the segmentation and establish polarity within each segment. They do not direct cell movements during differentiation, trigger the reorganization of the larval body into an adult body, or set up the back-to-belly axis of the larval body.

In Combination, What Do the Products of Gap Genes, Pair-