 Extending a bit on this an using the pic as an example.... :D      If I recall correctly my biology classes, more specifically the Mendel laws, wouldn't it be possible that:    1) Both couples of grandparents produce 100% hybrid offspring (50% white and 50% black -- wB)    2) Parents being wB can produce either ww, wB, Bw or BB, in other words 50% chance of producing another hybrid, and 25% for producing full blooded Whites or Blacks    Is that correct? In my experience I've never seen a hybrid producing full white offspring, or maybe I'm missing something??