Researchers Suspect That the Gene FOXP2,which Is Involved in Speech

Multiple Choice

Researchers suspect that the gene FOXP2,which is involved in speech and cognition,has been under positive selection in the human lineage.Which observation would provide the strongest support for such a claim?

A) Genotypes at this locus are at Hardy-Weinberg equilibrium.
B) There is a higher rate of nonsynonymous substitutions than synonymous ones.
C) There is a lower rate of nonsynonymous substitutions than synonymous ones.
D) The gene evolves following the molecular clock.
E) The gene is a pseudogene.