. Earlobe attachment and shape are inherited. This happens due to the influence of a dominant allele. If the parents' genes express the dominant allele, the child will be born with free earlobes.. Eye colour is inherited. It is determined by variations in a person's genes. In the most elementary form, the inheritance of eye color is classified as a Mendelian trait.. Languages are learned, not inherited via the genes. All languages change during the course of time, and the longer the time period the greater the changes.. Skin colour is inherited. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics.