Joanna is depicted as having red shoulder-length hair, with a distinctive blonde streak that was the result of a genetic quirk.

Owen had no brothers or sisters; the supposedly genetic quirk that gave Deathstalkers the boost also killed most children before they reached maturity.

By a genetic quirk a tiny percentage of male elephants have always been tuskless.

Indeed, it was widely believed that, due to some genetic quirk in an already flawed process, female straights simply did not exist.

Not everyone agrees that it makes sense to define the ants' genetic quirks as new sexes.

That genetic quirk, he warned, could lead to the wrong results.

Its people were a small and sturdy humanoid species, not avian although some genetic quirk had given them feathers in place of hair.

These days he is spending time again being a father, and he has already noticed a genetic quirk.

You wondered what genetic quirk there was.

Yet for many centuries the full advantages this genetic quirk gave remained dormant.