It was said earlier that, "Unattached earlobes are the dominant trait, twice as many people have unattached earlobes compared to attached." There is not actually any real proof that unattached...
Human earlobes really have no practical function they are a "leftover" of human evolution, but earlobes have procreational usage if you like earings and gauging...
Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes?