Biology could draw Mendel's line sharper if it wanted (to pay for it).
Both "the law" and "commonsense" appear to be at some distance to the point established by Whitehouse in &3.3 Bateson, Saunders and Punnett's discovery of partial linkag. p.18 "Towards An Understanding of the Mechanism of Heredity"
Batesson, Saunders and Punnett (1905), working...for Mendel had postulated its occurrence at the time of formation of the pollen and egg cells. However, all the pollen-grains on any individual plant were found always to be alike.^* Pollen characters do not always behave like this" - see & 5.4..."
Obviously a plant is not a human so the distance becomes perhaps indeed inifinte once the transition of the same "algebra" is interpreted for the creature we are.
[This message has been edited by Brad McFall, 11-08-2003]