Practice Questions

TLS Online TPP Program

#Question id: 5003

Fruit fly eyes are of the compound type, structurally very different from the camera-type eyes of mammals. Even the camera-type eyes of mollusks, such as octopi, are structurally quite different from those of mammals. Yet, fruit flies, octopi, and mammals possess very similar versions of Pax-6. The fact that the same gene helps produce very different types of eyes is most likely due to

#Unit 11. Evolution and Behavior

the few differences in nucleotide sequence among the Pax-6 genes of these organisms.
variations in the number of Pax-6 genes among these organisms.
the independent evolution of this gene at many different times during animal evolution.
differences in the control of Pax-6 expression among these organisms.