Yo, Mr Duffy, he's the man with the plan rhymes so sick, you just can't understand Flowing at a speed of 167 beats per minute I'm the lyrical assassin, watch me kill it No intro, outro, just straight fire in my verse Every line I drop, gonna make your head burst I'm the king of this rap game, I'm here to reign Mr Duffy's on the mic, causing havoc and pain Duffy, the blood group system, let me break it down It's all about them antigense floating 'round From our red blood cells, they make a statement So unique, bringing diversity, we can't refrain it But here's the kicker, listen close, don't dismiss If you dont got that Fya and Fyb, certainly you'll miss Malaria, African descent, it's a connection Your cells say, "Keep away!" for protection (Verse 1) Duffy BGS, let's take it back to '50, Named after Mr. Duffy, man, that's nifty. Multi-transfused hemophiliac in the game, Anti-Fya, the first antibody, lit the flame. Fy3 and Fy5, in the genetic scheme, Reacting with Fya, Fyb, living the dream. African Americans, lacking Fy phenotypes, Evolutionary advantage, beating parasites. (Verse 2) FyFy, a null phenotype, no Fy antigens here, Plasmodium vivax, couldn't interfere. Individuals FyFy, lacking all Fy might, Evolutionary advantage, shining bright. White, Black, Chinese, frequencies unfold, In the Duffy rap, where the stories are told. Phenotypes dancing, in the genetic scene, Frequencies worth noting, in the Duffy gene. (Bridge) Dosage demonstration, antibodies in the mix, Fy3 and Fy5, playing genetic tricks. Enhanced or destroyed by the enzyme stream, In the Duffy rap, where the frequencies gleam. (Verse 3) Antigen frequencies, like a rhythmic beat, White, Black, Chinese, in the genetic heat. Transfusion units typed, in the genetic scroll, Clinical significance, in the stories told. Anti-Fy3 and Fy5, in the Duffy zone, Reacting with Fya, Fyb, genetic throne. Dosage in the dance, antibodies in the play, In the Duffy BGS, where the facts stay. Glycoprotein 1, the game changer, W:Fy(a+) at 66%, that's major. W:Fy(b+) at 83%, we elevate, B:Fy(a+) and (Fy(b+)) anticipate. Serologic crossmatch, AHG on the rise, In the Duffy rap, where knowledge flies. HTR and HDN, in the genetic tale, Antigens typed for transfusion, can't fail. Mr. Duffy's got drip, watch him as he's steppin' he's always on the weapon Fresh kicks on his feet, designer from head to toe He's the flyest in the game, everywhere he goes (Outro) Duffy BGS, in the genetic tale, From Mr. Duffy's days to the present trail. Frequencies noted, in the genetic gleam, In the rap of Duffy, where the facts redeem