what is the chance to find a lucky shamrock? Only 0.01 percent of white shamrocks have four leaves. In world wild, one shamrock on 10,000 have four leaves. But by playing with genes, it is easy to create a shamrock with more than four leaves. In 2009, a south korean team irradiated flowers of whomrock during the pollination with gamma rays. Those gamma rays are powerfull mutagens. Results: they got sixty percent of four leaves shamrocks ! One year later, an other american study confirmed the genetic origin. The phenotype 'three leaves' is managed by a dominant gene. But if this gene is mutated, meaning it is desactived others recessive genes can express. Those recssive genes create shamrocks with numerous leaves. One day a japanese garedener picked a 56 leaves shamrock !