Based on the Phylogeny Below, Does FOXP2 Provide an Accurate

Multiple Choice

Based on the phylogeny below, does FOXP2 provide an accurate molecular clock for timing of divergence events between mammals and primates, and between humans and chimps?

A) Yes, because we can plot the amino acid changes on the phylogeny, which shows the relationship between mice and all other primates including humans and chimps.
B) Yes, because there is one change on average for every three branches on the tree.
C) No, because the changes in amino acids do not occur at regular intervals.
D) No, because we do not know if Neanderthals had spoken language.