Question

The COII gene of a monkey has 203 base differences from the same gene in a rat and 210 base differences from the same gene in a mouse. Compare the evolutionary relationships between the monkey, the rat, and the mouse.

Answer 1

The point is that the in general, the more bases are similar (i.e., the fewer mutations have occurred to change the DNA sequence), the more recently the organisms diverged and more closely related they are.