Genes located in cells in different regions of the body during embryonic development may
A) be turned on and off.
B) never be turned on.
C) be turned on and left on.
D) be activated for only a short time in one cell and a long time in another cell.
E) do all of these.

Question

Quizplus · Accepted Answer

Genes can be turned on and off, activated for only a short time in one cell and a long time in another cell, or left on permanently depending on the developmental stage and cell type. Therefore, all of the choices are possible.

Genes Located in Cells in Different Regions of the Body