A Certain Breed of Mice Is Shown to Be Unable

Multiple Choice

A certain breed of mice is shown to be unable to regulate their sleep schedule in response to regular cycles of bright and dim light. What is one mechanism through which these mice could have obtained this deficiency?

A) The mice were bred without long (L) cones.
B) The mice were bred without rods.
C) The mice were bred without intrinsically photosensitive retinal ganglion cells.
D) The mice were bred without horizontal cells.
E) The mice were bred without the ability to produce retinal.