这些三叶草叶子的性状是通过什么方式遗传的，为什么白色三叶草有这么多珍贵稀有的性状，已困扰遗传学家和育种者多年。
How these leaf traits are inherited and why white clover has so many rare leaf traits and has puzzled geneticists and breeders for many years.
出于好奇，我问店主这么多的四叶草是如何得来的。
Out of curiosity, I asked the owner of the four-leaf clover is how so many come.
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