I'm not really sure, but I guess skin colour isn't passed genetically?
Louder, because the sound would have a stronger pitch for the ear it is closer to
Answer:
heterozygote advantage
Explanation:
Usually if the mutation is present and the individual is only a carrier then they are heterozygous
Answer: An Organ System
Explanation: Vascular plants have two distinct organ systems: a shoot system, and a root system. The shoot system generally grows above ground, where it absorbs the light needed for photosynthesis. The root system, which supports the plants and absorbs water and minerals, is usually underground.