If a population is in Hardy- Weinberg equilibrium, what is happening to that population? A. It is experiencing a shift in population size. B. It is not evolving. C. The population is migrating. D. Individuals are experiencing variations within the species. If a population is in Hardy Weinberg equilibrium , what is happening to that population ? A. It is experiencing a shift in population size . B. It is not evolving . C. The population is migrating . D. Individuals are experiencing variations within the species .