system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Are four leaf clovers just a genetic mutation of a three leaf clover? Why are they so hard to find?
gpt
Yes, they are a mutation of the 3-leaf variety. Most species of plants and animals have a number of mutations that come up on a regular basis, humans being born with extra fingers and toes, for example. 
They're hard to find because they aren't particularly common. I've seen areas where they seemed more common, but explaining that bit would likely take a geneticist.