The Largest Unit Within Which Gene Flow Can Readily Occur

Question

The largest unit within which gene flow can readily occur is a
A) population.
B) species.
C) genus.
D) hybrid.
E) phylum.

Accepted Answer

The concept of a species is defined by the ability to interbreed and produce fertile offspring. Therefore, the largest unit within which gene flow can readily occur is a species. Gene flow between different species is typically limited or nonexistent.