Almost every trait is polygenic which means it is affected by many genes. The polygenic denotes to deoxyribonucleic acid qualities such as the skin color, the hair color, the eye color and height that are inclined by multiple genes reasonably than other qualities that exist as a yes or such as gender or blood kind. The color of the skin, the hair and eyes are the outcome of the mixture of multiple genes which is why such bodily traits can vary severely among siblings. This is for the reason that respective blood relation gives one of their chromosomes to the descendants.