Suppose you have two groups of hamsters: one group consisting of animals with short circadian periods and the other consisting of animals with long circadian periods.The suprachiasmatic nuclei (SCN) of the long-day hamsters have been destroyed and short-day fetal SCN tissue has been transplanted into the lesioned tissue.What will be the result?
A) The long-day adults will remain arrhythmic.
B) The long-day adults will demonstrate long-day rhythms.
C) The long-day adult will demonstrate short-day rhythms.
D) The rhythms of the adults will become entrained to the laboratory lighting.
E) The long-day adults will exhibit free-running rhythms.

Question

Quizplus · Accepted Answer

The transplantation of short-day fetal SCN tissue will influence the rhythm of the long-day hamsters, leading them to demonstrate short-day rhythms. This is because the SCN acts as the master regulator of the circadian rhythm, and the transplanted tissue will set the rhythm according to its own genetic makeup, resulting in short-day rather than long-day rhythms.

Suppose You Have Two Groups of Hamsters: One Group Consisting