Now introducing our boy Muhammad Allele You got a genetic defect? He know how you feel When your health is acting funny and you need the real skinny He's the mouse you want to turn to, not Mickey or Minnie If you're studying a gene but you don't know how it works Knock that s**er out and see if he got any quirks Float like a bu*terfly, sting like a bee But mess with his genome and he act like ODB Don't call it a comeback, he's been doing this for years The reigning champ for understanding the science of our fears Better than a mutant, got no partial function, nope So you never got to worry 'bout him pulling a Rope-A-Dope As a model, he's the greatest, beating fly, fish or rat Can study cancer, aging, memory, movement, vision, diet and fat So when the next challenger steps up, bringing disease in your house Get in the ring, sound the bell, and all hail the knockout mouse