Initiating force of evolution is

Which one of the following factors will not affect the Hardy-Weinberg equilibrium?

$^{\prime} XX ^{\prime}$ is a type of selection process in evolution $^{\prime} XX ^{\prime}$ promotes the population changes in one particular direction $^{\prime} XX ^{\prime}$ favours small or large sized individuals, mean size of population changes in $^{\prime} XX ^{\prime}$. Identify $^{\prime} XX^{\prime}$

Primary source of allelic variation is

In a random mating population in equilibrium, which of the following brings about a change in gene frequency in non-directional manner?

Darwin's theory of natural selection to explain organic evolution was based on