Eye on DNA links to this online paternity calculator, which takes into account blood group, eye color, and earlobe type to determine whether a guy’s traits are consistent with paternity. Kind of cool. Someone actually asked me whether this was possible the other day, and the earlobes thing was the only one I could come up with. Eye, skin, and hair color are all kind of tricky; I doubt they get much precision from their eye color measure.
Any trait with fairly simple inheritance should do the trick; the problem is that most aren’t easily visible. Ability to roll your tongue could be a marker, for example. Anyone else got thoughts?
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