The uncommon disruptive selection also acts during transition periods when the current mode is sub-optimal, but alters the trait in more than one direction.
Nefran war n ohar harat inta deɣ exaddam alwaq wan ikkuy net alwaq wa id dumu wa ijlan war n aqqel addabara hullan mucham ikma samal daɣ a ojjaran tasdik iyyat